Automotive Leather Renovation
When leather or fabric upholstery has cuts, scratches, or general wear and tear, it lowers the value of the whole car, so caring for your car’s interior is essential. But this doesn’t necessarily mean having to replace expensive leather. With Fenice, you can restore the finish of leather upholstery safely and efficiently.
The benefits are twofold, because it is more cost effective than replacing the leather and it protects the value of the car’s original interior.
Clicking on each step below, you will find a more detailed explanation. (We recommend following the instructions closely and reading the descriptions of each product.)
Clean the seat and remove anything that could prevent adhesion of the new finish.
Step 1: Cleaning & Degreasing
A. Stains and grease prevent the new finish from adhering to the leather. First, a water-based cleanser should be used to remove any surface dirt. Remove surface dirt by cleaning the leather with a Stain Eraser Sponge soaked in Ultra Rapid Leather Cleaner, rubbing with circular motions. Remove any excess product with an absorbent paper towel or clean, dry cloth and leave to dry.
Treatment with Leather & Textile Degreaser is necessary for headrests, armrests and steering wheels, and sometimes also on seats. Spray a thick coat of Leather & Textile Degreaser on any greasy area and leave to work for at least 4 hours. The white powder produced will absorb any remaining grease from the leather. Do not dry, as this will inhibit degreasing. Remove the powder from the leather using a vacuum cleaner with a soft tip and then use a dry sponge.
B. Use Deep Cleaner F to clean the leather and improve adhesion. Apply the product with a clean, absorbent paper towel or cloth, throwing them away when soiled. Clean with Ultra Rapid Leather Cleaner to remove any residue.
A. Ultra Rapid Leather Cleaner – Leather & Textile Degreaser (if necessary)
B. Deep Cleaner F
Fill / Repair deep cracks and holes.
Step 2: Preparing the Surface and Repairing the Scratches
A. Glue down all raised flaps using Leather Glue WB. Apply the glue with a spatula to force glue into the scratch. Keep pressure on the flaps for about one minute. Remove any excess glue.
B. Sometimes there are worn areas that need to be filled using Mender, a white paste used to fill in deep cracks in worn areas. Mender may be mixed with up to 10% matching (or slightly darker) High Coverage Color or Pigment Base Coat to achieve better coverage of the repair to be done. Apply Menter gently using a spatula or rigid plastic card to fill deep cracks and holes without leaving any excess product on the leather surface. Leave to dry naturally for at least 4 hours, or overnight if possible. Avoid using a professional heat gun, as this would reduce the product’s performance and adhesion.
C. Once dry, lightly rub with 400-800 sand paper to smooth out the finished surface. Remove any dust particles with a clean cloth or a soft-tipped vacuum cleaner.
In case of superficial scratches, Surface Repair can be used. Apply the product on the damaged spot with a spatula. Use small quantities of product to form a thin layer. Many applications may be necessary to cover the damage.
Dry with a professional heat gun. Now you should have a smooth, even surface. If not, use Mender or Surface Repair again, as before.
A. Leather Glue WB – Colla
B. Mender (to fix deep cracks)
C. Surface Repair (to fix light scratches)
Apply Adhesion Promoter or Extra Adhesion to ensure adhesion of the color to the leather.
Step 3: Ensuring Adhesion
A. For greater adhesion, you may use the water-based Adhesion Promoter, mixed with 7-8% Eco-Crosslinker or 1-3% Crosslinker AZ5. Alternatively, the more powerful solvent-based Extra Adhesion may also be used, but it’s less environmentally friendly than the water-based Adhesion Promoter. Mask with tape any part of the seat you do not want to be colored. Apply the product with a sponge to areas that can’t be reached by spraying. Spray to create a light coat. Dry with a professional heat gun. At this point, the seat’s surface will be slightly sticky.
We recommend continuing with steps 4 and 5 as soon as possible. Minimal gaps between steps 3, 4 and 5 will ensure the best final result1.
(NOTE 1) Eco-Crosslinker or Crosslinker AZ5 strongly links Adhesion Promoter to the leather surface in order to ensure maximum adhesion. If High Coverage Color (HCC) is applied immediately after the Adhesion Promoter is dried, the crosslinker binds the color coat too. The result is superb adhesion with the leather surface as well as long durability. Any product mixed with crosslinkers must be used within 8 hours.
A. Adhesion Promoter + 7-8% Eco-Crosslinker or 1-3% Crosslinker AZ5
or Extra Adhesion
Cover and color the leather with High Coverage Color (HCC).
Step 4: Coloring THE SEAT
A. Now the leather seat is ready to be colored. You’ve probably already matched the seat color by mixing the needed tones of HCC High Coverage Color to apply Mender. If not, do it now. To make color matching easy, we’ve added a Color Formulation Chart and some Leather Swatches to the Professional Repair and Refinishing Kits. Select the Leather Swatch that best matches the color you would like to achieve. On the back of the swatch, you will find a reference number. Use this number to find the Color Formulation in the table provided.
Mix HCC High Coverage Color with 3-5% of Color Bonder to confer exceptional adhesion to even the most difficult surfaces. Color Bonder is an impregnation agent that greatly improves adhesion!
Spray a coat over all the seat, making all areas as uniform as possible. A professional heat gun may be used for quick drying. Repeat.
A. HCC High Coverage Color + Color Bonder
Set the color with the final Top Coat.
Step 5: Sealing and Protecting Leather
A. Application of Top Coat Matte / Top Coat Gloss is the final step in protecting leather. It protects against any color transfer and restores all its original physical properties. Examine the leather and decide the level of sheen desired in the final finish. Top Coat Matte and Top Coat Gloss can both be mixed in any ratio. Remember that a matte finish hides defects better and lends a more natural look.
Select the sheen required, mixing the two top coats if necessary, and then obtain the feel desired by adding a maximum of 3% of FM Slip Additive (feel modifier – silky hand) or FM Non-Slip Additive (feel modifier – rubbery hand).
A quantity of Eco-Crosslinker equal to 7-8% of the total of the top coat mixture, or 1-3% of Crosslinker AZ5, must be added to ensure that the original physical properties are restored.
All mixtures of Top Coat Matte and Top Coat Gloss containing crosslinkers must be used within 8 hours.
To give the leather a natural scent, add Leather Additive Fragrance in a quantity of up to 0.3% of the total weight of the final mix.
Apply the mixture with a sponge to areas which cannot be reached by spraying and then spray a coat of the mixture onto the leather. Use a professional heat gun to speed up drying. Repeat. Rub resistance may be checked after 48 hours by rubbing a wet, white cloth on the leather when dry and inspecting for any color transfer.
Apply Leather Protector after 24 hours and leave your renewed leather to rest for a couple of days. Remember to advise your customers to follow an appropriate cleaning and care routine with FENICE products to make sure their treasured leather will last for many years.
Now your customers can enjoy years of comfortable, renewed car seats thanks to Fenice’s safe, simple and environmentally friendly refinishing products.
A. Top Coat Gloss or Top Coat Matte + Eco-Crosslinker or Crosslinker AZ5 + FM Slip or Non-Slip Additive (feel modifiers) + Leather Additive Fragrance (a perfumed essence to give leather a natural scent).
Clean the seat and remove anything that could prevent adhesion of the new finish.
Step 1: Cleaning & Degreasing
A. Stains and grease prevent the new finish from adhering to the leather. First, a water-based cleanser should be used to remove any surface dirt. Remove surface dirt by cleaning the leather with a Stain Eraser Sponge soaked in Ultra Rapid Leather Cleaner, rubbing with circular motions. Remove any excess product with an absorbent paper towel or clean, dry cloth and leave to dry.
Treatment with Leather & Textile Degreaser is necessary for headrests, armrests and steering wheels, and sometimes also on seats. Spray a thick coat of Leather & Textile Degreaser on any greasy area and leave to work for at least 4 hours. The white powder produced will absorb any remaining grease from the leather. Do not dry, as this will inhibit degreasing. Remove the powder from the leather using a vacuum cleaner with a soft tip and then use a dry sponge.
B. Use Deep Cleaner F to clean the leather and improve adhesion. Apply the product with a clean, absorbent paper towel or cloth, throwing them away when soiled. Clean with Ultra Rapid Leather Cleaner to remove any residue.
A. Ultra Rapid Leather Cleaner – Leather & Textile Degreaser (if necessary)
B. Deep Cleaner F
Fill / Repair deep cracks and holes.
Step 2: Preparing the Surface and Repairing the Scratches
A. Glue down all raised flaps using Leather Glue WB. Apply the glue with a spatula to force glue into the scratch. Keep pressure on the flaps for about one minute. Remove any excess glue.
B. Sometimes there are worn areas that need to be filled using Mender, a white paste used to fill in deep cracks in worn areas. Mender may be mixed with up to 10% matching (or slightly darker) High Coverage Color or Pigment Base Coat to achieve better coverage of the repair to be done. Apply Menter gently using a spatula or rigid plastic card to fill deep cracks and holes without leaving any excess product on the leather surface. Leave to dry naturally for at least 4 hours, or overnight if possible. Avoid using a professional heat gun, as this would reduce the product’s performance and adhesion.
C. Once dry, lightly rub with 400-800 sand paper to smooth out the finished surface. Remove any dust particles with a clean cloth or a soft-tipped vacuum cleaner.
In case of superficial scratches, Surface Repair can be used. Apply the product on the damaged spot with a spatula. Use small quantities of product to form a thin layer. Many applications may be necessary to cover the damage.
Dry with a professional heat gun. Now you should have a smooth, even surface. If not, use Mender or Surface Repair again, as before.
A. Leather Glue WB – Colla
B. Mender (to fix deep cracks)
C. Surface Repair (to fix light scratches)
Apply Adhesion Promoter or Extra Adhesion to ensure adhesion of the color to the leather.
Step 3: Ensuring Adhesion
A. For greater adhesion, you may use the water-based Adhesion Promoter, mixed with 7-8% Eco-Crosslinker or 1-3% Crosslinker AZ5. Alternatively, the more powerful solvent-based Extra Adhesion may also be used, but it’s less environmentally friendly than the water-based Adhesion Promoter. Mask with tape any part of the seat you do not want to be colored. Apply the product with a sponge to areas that can’t be reached by spraying. Spray to create a light coat. Dry with a professional heat gun. At this point, the seat’s surface will be slightly sticky.
We recommend continuing with steps 4 and 5 as soon as possible. Minimal gaps between steps 3, 4 and 5 will ensure the best final result1.
(NOTE 1) Eco-Crosslinker or Crosslinker AZ5 strongly links Adhesion Promoter to the leather surface in order to ensure maximum adhesion. If High Coverage Color (HCC) is applied immediately after the Adhesion Promoter is dried, the crosslinker binds the color coat too. The result is superb adhesion with the leather surface as well as long durability. Any product mixed with crosslinkers must be used within 8 hours.
A. Adhesion Promoter + 7-8% Eco-Crosslinker or 1-3% Crosslinker AZ5
or Extra Adhesion
Cover and color the leather with High Coverage Color (HCC).
Step 4: Coloring THE SEAT
A. Now the leather seat is ready to be colored. You’ve probably already matched the seat color by mixing the needed tones of HCC High Coverage Color to apply Mender. If not, do it now. To make color matching easy, we’ve added a Color Formulation Chart and some Leather Swatches to the Professional Repair and Refinishing Kits. Select the Leather Swatch that best matches the color you would like to achieve. On the back of the swatch, you will find a reference number. Use this number to find the Color Formulation in the table provided.
Mix HCC High Coverage Color with 3-5% of Color Bonder to confer exceptional adhesion to even the most difficult surfaces. Color Bonder is an impregnation agent that greatly improves adhesion!
Spray a coat over all the seat, making all areas as uniform as possible. A professional heat gun may be used for quick drying. Repeat.
A. HCC High Coverage Color + Color Bonder
Set the color with the final Top Coat.
Step 5: Sealing and Protecting Leather
A. Application of Top Coat Matte / Top Coat Gloss is the final step in protecting leather. It protects against any color transfer and restores all its original physical properties. Examine the leather and decide the level of sheen desired in the final finish. Top Coat Matte and Top Coat Gloss can both be mixed in any ratio. Remember that a matte finish hides defects better and lends a more natural look.
Select the sheen required, mixing the two top coats if necessary, and then obtain the feel desired by adding a maximum of 3% of FM Slip Additive (feel modifier – silky hand) or FM Non-Slip Additive (feel modifier – rubbery hand).
A quantity of Eco-Crosslinker equal to 7-8% of the total of the top coat mixture, or 1-3% of Crosslinker AZ5, must be added to ensure that the original physical properties are restored.
All mixtures of Top Coat Matte and Top Coat Gloss containing crosslinkers must be used within 8 hours.
To give the leather a natural scent, add Leather Additive Fragrance in a quantity of up to 0.3% of the total weight of the final mix.
Apply the mixture with a sponge to areas which cannot be reached by spraying and then spray a coat of the mixture onto the leather. Use a professional heat gun to speed up drying. Repeat. Rub resistance may be checked after 48 hours by rubbing a wet, white cloth on the leather when dry and inspecting for any color transfer.
Apply Leather Protector after 24 hours and leave your renewed leather to rest for a couple of days. Remember to advise your customers to follow an appropriate cleaning and care routine with FENICE products to make sure their treasured leather will last for many years.
Now your customers can enjoy years of comfortable, renewed car seats thanks to Fenice’s safe, simple and environmentally friendly refinishing products.
A. Top Coat Gloss or Top Coat Matte + Eco-Crosslinker or Crosslinker AZ5 + FM Slip or Non-Slip Additive (feel modifiers) + Leather Additive Fragrance (a perfumed essence to give leather a natural scent).
What is refinishing?
There are three types of refinishing:
- Refinishing using transparent dyes (aniline), which is especially used with luxury leathers without any natural markings. This is a highly natural, transparent refinishing, but it leaves the leather exposed to dirt and grime, so is should only be used for leather kept in protected settings (e.g. in formal sitting area; not recommended for car interiors due in part to its limited protection against the discoloration caused by sunlight).
- A refinishing process that first uses high-coverage color (pigments) over which a transparent, binder layer is applied in order to protect the leather from external agents.
- Suede is a soft, natural leather that is pleasing to the touch, but it is extremely delicate, so it should never be used in cars and is now rarely used as upholstery for furniture, as it has been replaced by microfiber fabrics, which are much easier to care for.
Fenice’s refinishing techniques are safe, simple, and ecological.
What is refinishing?
There are three types of refinishing:
- Refinishing using transparent dyes (aniline), which is especially used with luxury leathers without any natural markings. This is a highly natural, transparent refinishing, but it leaves the leather exposed to dirt and grime, so is should only be used for leather kept in protected settings (e.g. in formal sitting area; not recommended for car interiors due in part to its limited protection against the discoloration caused by sunlight).
- A refinishing process that first uses high-coverage color (pigments) over which a transparent, binder layer is applied in order to protect the leather from external agents.
- Suede is a soft, natural leather that is pleasing to the touch, but it is extremely delicate, so it should never be used in cars and is now rarely used as upholstery for furniture, as it has been replaced by microfiber fabrics, which are much easier to care for.
Fenice’s refinishing techniques are safe, simple, and ecological.
Leather Renovation
Adhesion
When is good adhesion necessary?
When working on leather that has already been finished, monitor adhesion carefully to ensure that products adhere well to the previous finish. Finished leather can present various problems of adhesion due to dirt, grease or poor finishing. Check adhesion after the application of each product, and especially after the first coat.
How is good adhesion obtained?
By cleaning and degreasing the leather prior to any spraying application and only using products specifically designed for leather. One coat of diluted and crosslinked Adhesion Promoter will normally be enough to ensure good results. Extra Adhesion is a high-performance, ready-to-spray product, which is a faster alternative if a solvent-based product can be used. Finally, you can mix Color Bonder with HCC colors for exceptional adhesion on even the most problematic surfaces.
How can adhesion be tested?
Let the finished leather rest for 4 hours. Apply wide, transparent adhesive tape to the leather’s surface. Remove it quickly to see if any color is removed. If so, adhesion is poor and the leather will delaminate easily.
Leather Renovation
Adhesion
When is good adhesion necessary?
When working on leather that has already been finished, monitor adhesion carefully to ensure that products adhere well to the previous finish. Finished leather can present various problems of adhesion due to dirt, grease or poor finishing. Check adhesion after the application of each product, and especially after the first coat.
How is good adhesion obtained?
By cleaning and degreasing the leather prior to any spraying application and only using products specifically designed for leather. One coat of diluted and crosslinked Adhesion Promoter will normally be enough to ensure good results. Extra Adhesion is a high-performance, ready-to-spray product, which is a faster alternative if a solvent-based product can be used. Finally, you can mix Color Bonder with HCC colors for exceptional adhesion on even the most problematic surfaces.
How can adhesion be tested?
Let the finished leather rest for 4 hours. Apply wide, transparent adhesive tape to the leather’s surface. Remove it quickly to see if any color is removed. If so, adhesion is poor and the leather will delaminate easily.
How can leather defects be corrected during the finishing process?
Leather finishing can be done on full-grain leather (where the natural surface of the leather appears like human skin) or on buffed leather. Buffed leather is obtained by sanding full-grain leather with a specially designed machine using sandpaper of the appropriate coarseness for the desired result, e.g. 180 for low-quality leather or 600 for higher quality leather. This is done on leather with many defects; therefore, buffed leather has a lower value. Buffing helps to hide defects. To improve leather quality, a stucco (or paste) known as a ‘mender’ is sometimes applied by spatula to fill deep cracks and other defects. When dry, the leather is buffed, then finished. The above procedure is done in the tannery, and Fenice uses the same process for leather re-finishing.
The type of sanding performed on leather results in an additional classification of leather:
- FULL-GRAIN: non-sanded;
- CORRECTED: snuffed (sanded with fine sandpaper leaving some of the top grain);
- BUFFED: sanded (with the top grain fully removed).
A pattern similar to the original grain is then recreated by embossing the leather.
How can leather defects be corrected during the finishing process?
Leather finishing can be done on full-grain leather (where the natural surface of the leather appears like human skin) or on buffed leather. Buffed leather is obtained by sanding full-grain leather with a specially designed machine using sandpaper of the appropriate coarseness for the desired result, e.g. 180 for low-quality leather or 600 for higher quality leather. This is done on leather with many defects; therefore, buffed leather has a lower value. Buffing helps to hide defects. To improve leather quality, a stucco (or paste) known as a ‘mender’ is sometimes applied by spatula to fill deep cracks and other defects. When dry, the leather is buffed, then finished. The above procedure is done in the tannery, and Fenice uses the same process for leather re-finishing.
The type of sanding performed on leather results in an additional classification of leather:
- FULL-GRAIN: non-sanded;
- CORRECTED: snuffed (sanded with fine sandpaper leaving some of the top grain);
- BUFFED: sanded (with the top grain fully removed).
A pattern similar to the original grain is then recreated by embossing the leather.
The role of a crosslinker | Eco-Crosslinker – Crosslinker AZ5
Why use crosslinkers?
Crosslinking’ chemicals are added to either water- or solvent-borne top coats to improve the performance of finished leather, including rub resistance, wet and dry abrasion resistance, etc.
What are crosslinkers?
Crosslinkers are complex organic molecules that create chemical links between the molecular chains of the polymers in the topcoat film deposited on the leather.
The chemical reaction can be seen with a microscope. This diagram shows an example of Fenice’s Adhesion Promoter without any crosslinkers.
The role of a crosslinker | Eco-Crosslinker – Crosslinker AZ5
Why use crosslinkers?
Crosslinking’ chemicals are added to either water- or solvent-borne top coats to improve the performance of finished leather, including rub resistance, wet and dry abrasion resistance, etc.
What are crosslinkers?
Crosslinkers are complex organic molecules that create chemical links between the molecular chains of the polymers in the topcoat film deposited on the leather.
The chemical reaction can be seen with a microscope. This diagram shows an example of Fenice’s Adhesion Promoter without any crosslinkers.
However, if crosslinkers are added to our products before spraying, this forms ‘bridges’ that anchor the product’s molecules both together and to the leather to greatly increase rub resistance.
To be specific, this reaction creates a three-dimensional structure that dramatically increases the top coat’s mechanical properties such as surface hardness, toughness, and flex resistance. This crosslinking reaction also reduces and even removes the presence of water-sensitive hydrophilic functional groups in the polymeric structure, resulting in greater water resistance and improved wet-rub fastness.
Why must a mixture containing crosslinkers be used within 8 hours?
Crosslinkers are made of reactive molecules dissolved in inert solvents and start to react as soon as they are added to the topcoat. Better results are quickly achieved, but the creation of these ‘bridges’ starts a continuous reaction that increases the product’s viscosity, meaning that it becomes unusable within 8 hours.
How are crosslinkers added to the mixture?
The crosslinker must be added to the fixing agent very carefully: add the crosslinker slowly, while stirring, to avoid it reacting too quickly with the topcoat. We recommend Fenice’s Eco-Crosslinker, an effective, easy-to-use crosslinker that is particularly suited to crosslinking with water-based topcoats.
We also recommend following these simple rules:
- • Add crosslinker to the topcoat just before use.
- • Add crosslinker slowly while stirring to ensure the it is perfectly dispersed within the fixing agent.
How long does the crosslinking process take to complete?
Once the mixture of the topcoat and crosslinker has been applied and left to dry, the crosslinking action will gradually increase general resistance (particularly wet and rub resistance). The whole process is normally completed within 48-72 hours.
How should leather be dried after the application of a crosslinked mixture?
The leather must be dried thoroughly after the application of the topcoat because the crosslinker within the applied film is sensitive to humidity. If the leather is dried well with a professional heat gun after fixing, all the crosslinker contributes to improving the physical characteristics of the leather.
However, if left to dry naturally, the performance of the leather will be slightly reduced because part of the crosslinker will have been neutralized by humidity in the air. The positive aspect is that the leather will still perform better than without crosslinkers.
What precautions should be taken when using crosslinkers, especially crosslinker AZ5?
There are some important safety precautions which should always be followed when using any chemical crosslinkers.
- Avoid direct contact with skin.
- Use impermeable rubber gloves.
- Do not inhale any vapors.
- Only use the product in well-ventilated areas.
However, if crosslinkers are added to our products before spraying, this forms ‘bridges’ that anchor the product’s molecules both together and to the leather to greatly increase rub resistance.
To be specific, this reaction creates a three-dimensional structure that dramatically increases the top coat’s mechanical properties such as surface hardness, toughness, and flex resistance. This crosslinking reaction also reduces and even removes the presence of water-sensitive hydrophilic functional groups in the polymeric structure, resulting in greater water resistance and improved wet-rub fastness.
Why must a mixture containing crosslinkers be used within 8 hours?
Crosslinkers are made of reactive molecules dissolved in inert solvents and start to react as soon as they are added to the topcoat. Better results are quickly achieved, but the creation of these ‘bridges’ starts a continuous reaction that increases the product’s viscosity, meaning that it becomes unusable within 8 hours.
How are crosslinkers added to the mixture?
The crosslinker must be added to the fixing agent very carefully: add the crosslinker slowly, while stirring, to avoid it reacting too quickly with the topcoat. We recommend Fenice’s Eco-Crosslinker, an effective, easy-to-use crosslinker that is particularly suited to crosslinking with water-based topcoats.
We also recommend following these simple rules:
- • Add crosslinker to the topcoat just before use.
- • Add crosslinker slowly while stirring to ensure the it is perfectly dispersed within the fixing agent.
How long does the crosslinking process take to complete?
Once the mixture of the topcoat and crosslinker has been applied and left to dry, the crosslinking action will gradually increase general resistance (particularly wet and rub resistance). The whole process is normally completed within 48-72 hours.
How should leather be dried after the application of a crosslinked mixture?
The leather must be dried thoroughly after the application of the topcoat because the crosslinker within the applied film is sensitive to humidity. If the leather is dried well with a professional heat gun after fixing, all the crosslinker contributes to improving the physical characteristics of the leather.
However, if left to dry naturally, the performance of the leather will be slightly reduced because part of the crosslinker will have been neutralized by humidity in the air. The positive aspect is that the leather will still perform better than without crosslinkers.
What precautions should be taken when using crosslinkers, especially crosslinker AZ5?
There are some important safety precautions which should always be followed when using any chemical crosslinkers.
- Avoid direct contact with skin.
- Use impermeable rubber gloves.
- Do not inhale any vapors.
- Only use the product in well-ventilated areas.
Contact us
For whatever you may need, simply send an email to info@fenice.care
or use the form below.
Contact us
For whatever you may need, simply send an email to info@fenice.care
or use the form below.