Alexei Volkov
Car interior plastics can fade over time, especially if they are regularly exposed to sunlight. Replacement interior trim and restoration interiors can be expensive and sometimes impossible to find. One option is to restore the original parts by refinishing them with paint designed for plastic and vinyl. However, not all plastics take paint or adhesives in the same way, and different plastics require different prep. For example, plastics are oil-based, so they need more mechanical bonding rather than chemical bonding. In addition, if a part has been treated with Armor-All, paint may not stick as well because that product tends to absorb into the plastic. When painting car interior plastic, it is important to take your time and follow the steps carefully.
| Characteristics | Values |
|---|---|
| Why repaint car interior plastic | Auto interior plastic colors can fade over time, especially if exposed to sunlight. Replacement interior trim and restoration interiors can be expensive and sometimes impossible to find. |
| How to repaint car interior plastic | Identify the type of plastic being used. Remove the part from the car and soak it in soapy water. Clean the part with a bucket of dish soap and rinse. Scuff the part until it loses its shine or gloss. Prime the part using a spray primer with adhesion promoter. Paint the part with ColorBond LVP or SEM vehicle interior paints. |
| Tips | Wear powderless latex or vinyl gloves when handling the parts. Do not paint in hot or humid weather. Do not use Armor-All or similar products on the parts. |
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What You'll Learn
Cleaning and preparing the plastic
Before repainting car interior plastic, it is important to clean and prepare the plastic surface. Here is a step-by-step guide:
Step 1: Remove the plastic parts from the car if possible. This is the quickest and most efficient way to prepare the plastic for painting. Use a razor or dedicated tool to carefully loosen the plastic trims from the body panel, being cautious not to damage the underlying surface or break the plastic moulding.
Step 2: Soak the parts in a bucket of soapy water. Use dish soap as it breaks down grease better than hand soap or car wash soap. This step helps remove years of built-up grease, oils, and polish that may prevent paint adhesion.
Step 3: Scrub the parts thoroughly with a grey scuff pad or a lint-free cloth, paying close attention to textured or recessed areas. This helps to remove any remaining contaminants and promotes adhesion.
Step 4: Rinse the parts with water and let them dry completely.
Step 5: Scuff the parts with a scuff pad or sandpaper to remove any shine or gloss. This step is crucial as it promotes adhesion by providing a rough surface for the paint to grip onto. Ensure you scuff around the edges and a bit of the underside.
Step 6: Wipe the part down with a recommended solution or acetone, being careful to apply the acetone to a rag rather than directly to the plastic.
Step 7: Prime the parts with a high-quality spray primer labelled as an Adhesion Promoter. Apply two to three coats, allowing each coat to dry for about 20 minutes. During this process, wear a mask to protect yourself from the primer's chemicals.
It is important to note that different types of plastics may require specific prep methods. Always ensure to identify the type of plastic you are working with and follow the appropriate preparation procedures.
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Choosing the right paint
Once you have identified the type of plastic, you can select the appropriate paint. Not all plastics take paint in the same way, so it is important to choose a paint that is specifically designed for the type of plastic you are working with. For example, if you are painting a plastic surface that will be exposed to sunlight, choose a paint with UV stabilizers to protect the surface from UV rays and prevent colour fading.
It is also important to consider the colour and finish of the paint. Automotive paints come in a wide range of colours and finishes, so you can choose one that matches the original colour or go for a completely new look. If you are painting multiple parts, make sure to use the same brand and product line throughout for consistency.
In addition to choosing the right paint, proper surface preparation is key to achieving a successful finish. Clean the plastic surface thoroughly to remove any contaminants, such as dirt, dust, grease, or polish. You can use a mild detergent or a plastic cleaner for this step. If the plastic surface has a shiny or glossy finish, it is important to scuff it up a bit to promote better adhesion. You can use fine-grit sandpaper to lightly sand the surface until it becomes dull.
After cleaning and scuffing the surface, it is important to apply a primer. Choose a high-quality spray primer labelled as an "Adhesion Promoter" to improve the bond between the paint and the plastic surface. Apply two to three thin coats of primer, allowing each coat to dry for about 20 minutes before applying the next. Once the primer is dry, you can move on to applying the paint according to the manufacturer's instructions.
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Painting the plastic
The first step in preparing the plastic for painting is to remove it from the car and soak it in soapy water, using dish soap to break down any grease or oils built up on the surface. If the part cannot be removed, use masking tape and protection to prevent overspray. After soaking, scuff the parts to remove any shine or gloss, promoting adhesion for the paint. Apply acetone to a rag to remove any interior detailers, then soak the parts in a bucket of dish soap, rinse, and let them dry.
Once the part is clean and dry, it's time to prime it using a high-quality spray primer labelled as an "Adhesion Promoter". Apply two to three layers of primer, allowing each coat to dry for about 20 minutes before applying the next layer. When priming, be sure to use the same brand and product line throughout the process. For example, if using Dupli-Color for the primer, use the same brand for the colour and clear coats.
After priming, you can begin painting the plastic parts. It is recommended to avoid painting in hot or humid weather, as the paint may not cure properly. Take your time during the painting process, and don't be afraid to sand everything off and try again if needed. Treat the parts as if they are exterior parts and avoid using products like Armor-All on the painted surfaces. With the right preparation and products, you can achieve a custom look for your car's interior plastic components.
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Avoiding common issues
Repainting car interior plastic can be a fun and inexpensive way to refresh your car's interior. However, there are some common issues to be aware of and avoid. Here are some detailed instructions to help you achieve the best results:
Choose the Right Paint
Not all plastics take paint or adhesives in the same way. Different types of plastics require specific treatments. Identify the type of plastic you are working with. Common plastics used in cars include PP (polypropylene), ABS (Acrylonitrile Butadiene Styrene), PPS (Polyphenylene Sulfide), PA (Nylon or Polyamides), and PVC (Polyvinyl Chloride). Choose a paint designed for plastic and vinyl, such as ColorBond LVP, which can bond with leather, vinyl, and plastic.
Prepare the Surface
Clean the plastic surface thoroughly to remove any grease, dirt, or old coatings. Soak the parts in a bucket of dish soap, rinse them, and let them dry. Scuff the parts to remove any shine or gloss, promoting better paint adhesion. Use sandpaper or a scuff pad to dull the surface, paying attention to the edges and underside. Wipe the part down with the recommended solution, such as acetone applied to a rag, to remove any remaining residue.
Priming
Priming the plastic parts is essential. Use a primer or adhesion promoter specifically designed for plastics, such as SEM or Dupli-Color. Hold the can about 8-10 inches away and apply two wet, even coats. If you encounter any runs in the primer, let it dry, sand it out, and then re-prime. Ensure that you get the primer/promoter on the edges and underside of the part as well.
Painting
Always use the same brand and product line throughout the process. Follow the manufacturer's instructions for application techniques and drying times. Avoid painting in hot or humid conditions as the paint may not cure properly. Take your time and don't rush the process. Be creative and experiment with different colors or masking patterns.
Avoid Armor-All or Similar Products
Do not use Armor-All or similar products on the painted parts, as they can interfere with paint adhesion. If the plastic part has been treated with Armor-All in the past, thoroughly clean and scuff the surface to ensure the paint will adhere properly.
Protective Gear
Always wear powderless latex or vinyl gloves when handling the parts to prevent skin oils from coming into contact with the plastic, which can cause spots or fisheye.
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Seeking professional help
If you're considering repainting your car's interior plastic, seeking professional help is a great option to ensure a high-quality and long-lasting finish. Here are some benefits and steps to guide you through the process:
Benefits of Professional Services:
- Quality Finish: Professional car detailers have the expertise and tools to deliver a seamless and durable paint job. They can match colours perfectly and ensure an even, smooth finish.
- Time and Effort Saving: Repainting car interior plastic can be time-consuming and intricate work. Professionals can complete the job efficiently, saving you valuable time and effort.
- Access to Specialist Knowledge: Different plastics require specific prep methods and paints. Professionals can identify the type of plastic and select the right products, ensuring a compatible and long-lasting paint job.
- Avoid Common Pitfalls: Repainting car interior plastic has potential pitfalls, such as improper cleaning, inadequate scuffing, or using the wrong paint type. Professionals can avoid these issues, ensuring a successful outcome.
Steps for Seeking Professional Help:
- Find Reputable Detailers: Research and ask for recommendations to find experienced professionals with expertise in repainting car interior plastics. Look for specialists who understand the unique challenges of painting plastic components.
- Consultation and Inspection: Schedule a consultation to discuss your goals and expectations. Professionals will inspect your car's interior plastic, assess the work required, and provide a detailed quote.
- Surface Preparation: Professionals will carefully remove interior plastic components or mask off surrounding areas to prevent overspray. They will thoroughly clean the surfaces, removing any grease, polish, or contaminants that could hinder paint adhesion.
- Primer Application: A suitable primer will be chosen based on the type of plastic. Professionals will apply the primer evenly, ensuring adequate adhesion and creating a smooth base for the paint.
- Paint Selection and Application: Professionals will select paint specifically formulated for automotive plastic components. They will apply thin, even coats, allowing proper drying time between coats to achieve a seamless finish.
- Quality Assurance: Reputable professionals will inspect the work, ensuring the paint job meets their standards and your expectations. They may offer a warranty or guarantee for their services.
- Aftercare Advice: Professionals can provide guidance on maintaining the newly painted interior, including recommendations for cleaning products and aftercare procedures to prolong the life of the paint job.
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Frequently asked questions
First, you need to remove the plastic part from the car and soak it in soapy water. If the part cannot be removed, use masking tape and protection to prevent overspray. It is important to use dish soap as it breaks down grease better than hand soap or car wash soap. Once the part is clean, use a spray primer labelled "Adhesion Promoter" on the front and back of the part.
There are many types of plastics used in cars, and not all plastics take paint or adhesives in the same way. The type of plastic is usually marked on the back of the part. Common types of plastic include PP (polypropylene), ABS (Acrylonitrile Butadiene Styrene), PPS (Polyphenylene Sulfide), PA (Nylon or Polyamides) and PVC (Polyvinyl Chloride). ColorBond LVP is a popular paint option for car interior plastic as it is formulated to bond with leather, vinyl and plastic. SEM paint products are also recommended for their high-quality prep and application products.
Do not paint in hot or humid weather as the paint may not cure properly. Avoid using Armor-All or similar products on the parts as they can prevent paint from sticking. Do not rush the painting process as this can lead to an imperfect finish.
