Sofia Martinez
Revamping the look of your car or covering up stains and dullness from wear and tear can be done by repainting your car's plastic trim. It is important to note that the process may vary depending on the car's make and model. The first step is to gather the right tools, such as automotive spray paint, sandpaper, primer, lacquer, and a microfiber cloth. The next step is to carefully remove the plastic trim from the car's exterior, or mask off the surrounding areas with tape if removal is not possible. Once the surface is prepared, sand it down to achieve a smooth finish and remove the shine from the plastic. After sanding, clean the surface with warm soapy water to remove any dirt or debris. Then, apply the primer and spray paint, ensuring an even finish. Finally, apply several coats of lacquer and allow it to dry before reattaching the trim and polishing it with a microfiber cloth.
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Sanding the trim
Start by selecting the appropriate sandpaper. It is recommended to have several different grits of sandpaper, ranging from 150-grit to 1200-grit. This will help you achieve a smooth finish on the plastic surface. Work your way up the grit levels, starting with a lower grit and gradually moving to a finer grit.
When sanding, take your time and work slowly. The goal is to remove the shiny surface from the plastic trim. This is important because it will help the primer and paint adhere better and provide a more durable finish. Make sure to sand evenly and thoroughly across the entire surface.
As you sand, pay attention to any bobbles or raised marks on the plastic. Use the sandpaper to smooth out these imperfections and create a uniform surface. Be careful not to apply too much pressure, as you don't want to create dents or damage the trim.
Once you have finished sanding, clean the trim with warm or soapy water. This will remove any dirt, dust, or debris that may have been left behind by the sandpaper. Ensure that the surface is completely clear and free of any residue before moving on to the next step, which is priming.
It is important to note that sanding the trim can be a time-consuming process, but it is crucial to achieving a professional and long-lasting finish. Take your time, work in a well-ventilated area, and wear a mask to protect yourself from inhaling any debris or chemicals.
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Choosing the right paint
For ABS and PVC plastics, which are commonly used in car manufacturing, a urethane-based paint is recommended. Urethane paint is a two-component paint that provides a durable and flexible finish. If you're working with ASA plastics, a polyurethane-based paint is the best choice.
Specialized trim paints are specifically designed for painting plastic car trim and offer several advantages. These paints provide durability, UV resistance, and a smooth finish. They are available in various colours and can be applied using a brush or a spray gun.
When selecting a paint type, you can choose between water-based and solvent-based options. Acrylic paint is a water-based choice that is easy to clean up and dries quickly. Enamel paint, on the other hand, is solvent-based and provides a hard, glossy finish.
Additionally, consider using a clear lacquer to protect the paint and add a glossy finish. Clear lacquer provides a shiny appearance and can be applied in multiple coats to achieve the desired result.
Remember, it's crucial to use high-quality materials to ensure a long-lasting finish. Consult with experts or professionals if you need advice on choosing the right paint for your specific project.
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Applying primer
Before applying primer, it is important to prepare the plastic car trim for the process. This involves removing the trim from the car's exterior, or, if that is not possible, masking off the surrounding bodywork to prevent overspray. Once this is done, the surface must be sanded down to ensure it is as smooth as possible. The aim is to remove the shiny surface from the plastic, which will help the primer and paint adhere better. After sanding, clean the plastic part with warm water to remove any dirt or debris left by the sandpaper.
Now, you can apply the primer. Choose a primer that is suitable for use on plastics, as this will ensure that the paint job is completed to a high standard without the need for reworking. Plastic primer softens the plastic surface, allowing the paint to stick better. Epoxy primer is considered superior to plastic primer, so consider using that instead. When applying the primer, make sure to apply a thin coat and avoid letting it pool in crevices, as this can cause the primer to wrinkle.
If you are applying primer over existing paint, it is recommended to smooth out the existing paint with a lower grit before applying the primer. Additionally, consider using an adhesion promoter before applying the primer, as this will help the paint adhere better and prevent it from flaking off.
After applying the primer, leave it to dry completely before moving on to the next step, which is usually applying paint. The drying time may vary depending on the type of primer used, so refer to the manufacturer's instructions for the best results.
By following these steps and using the appropriate materials, you can effectively apply primer to plastic car trim, ensuring a smooth and lasting paint job.
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Using lacquer
Lacquer is an important step in the process of repainting plastic car trim, as it helps protect the colour and ensures a long-lasting paint job. There are a few different types of lacquer to choose from, including gloss and matte, and clear lacquer will provide a shiny appearance over the new paint job.
Before applying lacquer, it is important to prepare the plastic trim by removing it from the car's exterior if possible. This can be done by working a razor or a dedicated tool between the trim and the body panel to loosen it. If removal is not possible, the surrounding bodywork should be masked off to prevent overspray. Once the trim is removed, it should be cleaned with warm water to remove any dirt or debris.
The next step is to sand down the surface of the trim to ensure it is as smooth as possible. This can be done using sandpaper with different grits, working slowly and gradually increasing the grit levels. The aim is to remove the shiny surface from the plastic to help the primer and paint adhere better.
After sanding, the trim should be cleaned again to remove any remaining dirt or debris. Then, a high-quality primer should be applied from about 6-7 inches away, with 3-4 coats applied and 15 minutes of drying time between each coat. Once the primer is dry, the paint can be applied in the same manner as the primer, with 3-4 coats and drying time between each coat.
Finally, the lacquer can be applied. It is recommended to apply 4-5 coats of lacquer gradually to get the best finish. After the lacquer has dried, the trim can be reattached to the car.
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Polishing
Prepare the Trim
Start by giving the trim a quick wipe with a clean, dry microfiber cloth to remove any dust or dirt. This will prevent the polishing pad from spreading dirt around the trim.
Mask the Surrounding Areas
Use masking tape to cover any rubber, metal, or glass surrounding the trim. This will protect these areas from the polishing compound and ensure a clean finish. Get the tape as close to the trim's edge as possible to avoid gaps. If your trim has curved areas, use perforated trim masking tape, which can easily conform to bends. For straight edges or slight bends, standard precision masking tape is suitable.
Prime the Polishing Pad
Attach a foam pad to your rotary polisher. A standard rotary polisher may be too large for trim work, so consider using a mini or 3-inch polisher to avoid residue pickup from the tape. Prime the foam pad with a light- to medium-strength automotive polishing compound. Spread a thin bead of the compound in a circle on the pad, using your gloved finger. Avoid using hard-polishing or cutting compounds as these can damage the plastic.
Polish the Trim
Set the rotary polisher to a medium-low speed. Start from the top and work your way down if the trim is vertical, or start from one end and work horizontally. Hold the pad against the surface of the trim and turn on the polisher.
Wipe Down the Trim
Once polishing is complete, wipe the trim with a microfiber cloth to remove any remaining polishing compound. Remove the masking tape, and if there is any residue left behind, wipe it away with the cloth.
Additional Tips
For a quicker fix, you can use a trim restoration spray to remove discoloration, dirt, and blemishes. However, for a thorough polishing job, the process described above, using a rotary polisher and a polishing compound, is recommended.
Additionally, if you have scratches on your plastic trim, you can try creating a paste with a 2:1 ratio of baking soda to water and applying it to the scratches before polishing.
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Frequently asked questions
First, you'll want to remove the plastic trim from your car, if possible. Use a screwdriver to slowly remove the screws holding the trim in place. Then, mix some soapy water in a bucket or sink and thoroughly clean the trim.
You'll need paint, sandpaper, a mask, primer, a microfiber polishing cloth, and a can of adhesion promoter.
It depends on the type of plastic you are painting. If you are unsure, a specialist at a hardware store should be able to advise you.
Start by sanding the trim to remove any imperfections. Then, apply 2-4 coats of primer, waiting 10-15 minutes between coats. Once the primer is dry, apply 2-3 coats of paint, spraying in different directions for each coat.
To prevent oxidation, park your car in a garage or use a car cover that blocks UV rays. You can also apply a premium protectant to the trim to shield it from the elements.
