Omar Khalid
Painting plastic trim on a car is a great way to freshen up its look. Most plastic trims and parts of a car's exterior can be painted over, but the specific plastic trim parts that are painted may vary depending on the car's make and model. For example, the plastic trim parts of a VW T6 Transporter that can be painted include the interior light control, the a-pillar, and the handle. Painting plastic trim on cars such as the VW T6 Transporter and R53 typically involves sanding, degreasing, applying adhesion promoter, priming, spraying, and sealing.
| Characteristics | Values |
|---|---|
| Painting plastic trim | Spray paint |
| Painting tools | Spray can, brush, roller |
| Paint type | Automotive paint, acrylic coating |
| Paint finish | Matte, Gloss |
| Paint color | Black, Dark Grey, custom colors |
| Plastic trim location | Interior, Exterior, Wheel arches, Pillars |
| Plastic trim parts | Vents, cup holders, stereo surround, switches, Handles |
| Preparation | Sanding, Degreasing, Adhesion promoter, Primer |
| Additional tools | Screwdriver, Sandpaper, Masking tape, Clear lacquer, Microfiber cloths |
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What You'll Learn
Painting plastic trim wheelarches
Painting plastic wheel arches on a VW car can be a challenging task. Some car owners opt to paint their wheel arches to achieve a certain aesthetic, such as a colour-matched look or a specific finish like gloss or matte black. However, it is important to note that painting plastic wheel arches can be labour-intensive and may not yield long-lasting results.
Before painting, it is crucial to prepare the surface of the wheel arches properly. This involves cleaning the area thoroughly to remove any dirt, grease, or debris. Using a suitable car cleaner or a product like eucalyptus oil can help ensure the surface is free of contaminants. Isolating the wheel arches and masking off surrounding areas with tarpaulin or tape can help achieve a clean paint job without cut-off marks.
The next step is sanding. Sanding the plastic surface of the wheel arches helps create a texture that paint can adhere to. It is important to continuously compare the sanding angle to ensure a consistent finish. Wet sanding is recommended as it helps keep the sandpaper unclogged. Using a spray putty can help fill in any low areas or imperfections caused by over-sanding.
After sanding, a primer designed specifically for plastic car parts should be applied. Multiple layers of primer may be necessary to ensure a good base for the paint. Once the primer is dry, the paint can be applied. It is recommended to use paint designed for automotive touch-ups or a product like Solution Finish for a colour-matched look.
While some car enthusiasts choose to paint their plastic wheel arches, it is important to note that it may not be a permanent solution. Even with the right products and preparation, painted plastic wheel arches may start flaking, chipping, or fading quicker than expected. As an alternative to painting, some car owners choose to use a heat gun to restore the appearance of their wheel arches. Additionally, products like Solution Finish have been recommended by auto detailers to restore faded or discoloured plastic trim.
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Removing trim for painting
Painting your VW's plastic trim can be a great way to freshen up the look of your car. The process involves several steps, from preparing the trim to applying the paint and finishing it with a clear coat.
Removing the Trim
Firstly, it is important to determine if the trim can be removed. If it can, this will make the painting process easier and help achieve a more even coat of paint. Use a screwdriver to slowly remove the screws holding the trim in place. Ensure that there are no electrical components attached to the trim when removing it. Keep the screws for each part separate to avoid mixing them up when reassembling.
Cleaning and Sanding
Once the trim is removed, clean the plastic surface with soapy water or a degreaser to remove any dirt, grease, or debris. After cleaning, the trim needs to be sanded to create a smooth surface for the paint to adhere to. Use sandpaper with different grit levels, working your way up gradually to achieve the desired smoothness. The goal is to remove the shiny surface of the plastic, which will help the paint adhere better and provide a lasting finish. After sanding, clean the trim again with warm water to remove any remaining dirt or debris.
Applying Paint and Clear Coat
With the trim prepared, it's time to apply the paint. Use a high-quality primer, holding the can about 6-7 inches away from the surface of the trim. Wear a mask during this step to protect yourself from the primer's chemicals. Apply three to four coats of the primer, allowing 15 minutes between each coat for drying.
After the primer has dried, it's time to apply the paint. Use automotive spray paint suitable for use on plastics, as it will adhere better to the surface. Hold the can about 6 inches away from the trim and apply thin, even coats, working your way back and forth across the surface. You may need more coats for drastic colour changes.
Finally, apply a clear coat enamel over the paint to protect it and give it a shiny appearance. Hold the can about 6 inches away and apply a thin coat across the entire surface. Allow the clear coat to dry for 2-3 hours.
Tips and Tricks
- If you cannot remove the trim, use masking tape to mask off the surrounding areas to prevent overspray.
- For curved parts, use perforated trim masking tape, and for straight edges, use precision masking tape.
- Always work in a well-ventilated area and wear the appropriate protective gear, such as masks and gloves.
- If you're unsure about the colour or want an easier alternative, consider vinyl wrapping the trim instead of painting it.
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Using adhesion promoter
Painting plastic car parts can be a great way to freshen up your car's trim. It's important to prepare the plastic trim correctly to ensure the paint adheres well and you achieve a smooth and lasting finish.
Adhesion promoters, or surface modifiers, are essential when making certain types of adhesive plastic repairs. If not used when required, or if applied incorrectly, the repair will fail. Adhesion promoters are particularly important when working with olefin plastics, which have a "greasy" feel.
To use an adhesion promoter, first, ensure it is compatible with the plastic repair adhesive you are using. Do not use a paint manufacturer's plastic adhesion promoter, as these are designed for different materials. Check the product instructions for the correct application method. Typically, you will shake the can of adhesion promoter and hold it about 6 inches (15 cm) from the surface of the trim. Apply a thin coat, working your way back and forth across the trim. Once one side is finished, flip it over and spray the other side.
After applying the adhesion promoter, you can proceed with spray painting. Use a spray paint designed for plastic, as this will adhere better. Hold the can about 6 inches (15 cm) from the trim and apply thin, even coats, working back and forth across the surface. You may need to apply more coats for drastic colour changes.
For the best results, it is recommended to remove the trim from the car before painting. This allows for easier handling and a more even coat of paint. If removal is not possible, mask off the surrounding areas with tape to prevent overspray. Sanding the surface with sandpaper is also important to create a smooth base for the paint to adhere to. Finally, a clear coat or lacquer can be applied for a shiny appearance and added protection.
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Sanding and cleaning
Sanding:
Sanding the plastic trim helps create a rough surface for the paint to adhere to, ensuring better paint adhesion and a longer-lasting paint job. It is recommended to use fine-grit sandpaper or a fine-grit sanding block to gently sand the entire surface. Work slowly and methodically, using different grits of sandpaper to achieve an even finish. Pay extra attention to any shiny or glossy areas, as these may require more sanding to create a suitable surface for the paint to stick to. The goal is to create a slightly rough texture without damaging or weakening the plastic. If the plastic has curved surfaces or small crevices, sandpaper might be a more suitable option than a sanding block for easier manoeuvrability.
Cleaning:
Cleaning the sanded plastic surface is essential to remove any dust, dirt, or debris that may have accumulated during the sanding process. Here are the recommended steps:
- Wash the sanded plastic trim with warm water and a mild soap or dish detergent. Use a non-scratch sponge or a microfiber cloth to gently clean the surface, ensuring all dust and debris are removed.
- Rinse the trim thoroughly with regular water to remove any soap residue.
- Dry the plastic trim completely. You can use a towel to wipe away excess moisture and then let it air dry for at least an hour or until it is completely dry. Placing the trim in a well-ventilated area or near a fan can speed up the drying process.
- As a final step, wipe the surface with mineral spirits or isopropyl alcohol. This will remove any fine plastic dust that may remain after sanding. Use a clean rag, and wipe the surface as many times as needed until the rag comes out clean and dust-free. Ensure you are in a well-ventilated area when working with these chemicals, and exercise caution as the soaked rags can be flammable.
By following these sanding and cleaning steps, you will effectively prepare the plastic trim for painting, ensuring a smooth and durable finish.
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Applying lacquer
When applying lacquer to plastic, it is important to use an adhesion promoter to ensure the lacquer adheres to the plastic surface. An example of an adhesion promoter is "Mustang", a water-based conversion varnish that is popular among automotive enthusiasts.
Before applying the lacquer, it is essential to prepare the plastic surface. This includes removing any previous coatings, such as paint or primer, and sanding the surface to create a smooth and even finish. It is recommended to use a fine Scotch pad or sandpaper with different grits to achieve the desired smoothness. The surface should then be cleaned with warm water to remove any dirt or debris.
Once the surface is prepared, the adhesion promoter can be applied. Hold the can about 6 inches (15 cm) from the surface and apply a thin, even coat, working your way back and forth. Allow the promoter to dry completely before proceeding.
After the adhesion promoter has dried, you can apply the lacquer. Hold the can of lacquer about 6 inches (15 cm) from the surface and apply thin coats, working your way back and forth across the surface. It is recommended to apply four to five coats of lacquer, allowing each coat to dry for 2-3 hours before applying the next.
It is important to avoid applying heavy or wet coats of lacquer, as this can cause cracking or pooling in the creases. Instead, focus on building up thin, light coats to achieve the desired finish. Additionally, make sure to mask off any areas that should not be painted, such as electrical components or connections/pegs, to avoid overspray.
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Frequently asked questions
Most plastic trims and parts of a car's exterior can be painted over. The interior plastic trim can also be painted. Some specific examples include the interior light control, the a-pillar, and the handle.
First, remove the plastic trim from your car if possible. Then, clean the plastic trim with soapy water or a degreaser. Next, sand the plastic trim to remove the shiny surface. After that, apply an adhesion promoter, followed by a primer. Finally, apply the spray paint.
You will need masking tape, clear lacquer, microfiber cloths, sandpaper, spray paint, a screwdriver, and a can of clear coat.
First, remove the trim and clean it with soapy water or a degreaser. Next, sand the trim to create a smooth surface for the paint to adhere to. Then, apply an adhesion promoter and a primer. Finally, apply several thin coats of spray paint, allowing each layer to dry before applying the next.
