Sofia Martinez
Painting plastic wheel wells can be a tricky process, but it's a great way to improve the look of your car and protect the wheel wells from corrosion and dirt. There are a variety of methods and products that can be used to achieve the best results, including cleaning and prepping the wheel wells, using a primer, and choosing the right type of paint. Some common issues that people encounter when painting plastic wheel wells are overspray and difficulty cleaning the wells beforehand. However, with the right tools and techniques, these issues can be avoided, and you can achieve a flawless finish that will last for years to come.
Characteristics and Values Table for Painting Plastic Wheel Wells
| Characteristics | Values |
|---|---|
| Cleaners | Simple Green, Eastwood Paint Pre, dish soap, wax and grease remover, engine degreaser, mineral spirits, paint thinner |
| Sealants | Wolfgang Trim Sealant, Black on Black |
| Paints | Krylon, SEM, Rustoleum Universal, Rustoleum Rattle Can, Rustoleum Satin Black, Herculiner, Duplicolor, Plasti-Dip, POR15, Rubberized spray, Bed Liner, 3M rubber undercoating |
| Tools | Propane torch, citristrip, sandpaper, scotch pads, wire wheel, wire brush, pressure washer, grill paint, primer, grill paint, grill paint, tape |
| Other | Plastic fender liners, plastic wheel well liners, sound deadener, undercoating |
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What You'll Learn
Recommended paints for plastic wheel wells
When it comes to painting plastic wheel wells, there are several recommended paints and techniques that can help achieve a durable and aesthetically pleasing finish. Here are some options to consider:
- Krylon Paints for Plastic: Krylon offers a range of paints specifically designed for use on plastic surfaces. These paints can provide good adhesion and a durable finish on plastic wheel wells.
- SEM Plastic/Vinyl Paints and Dyes: SEM manufactures paints and dyes suitable for both plastic and vinyl surfaces. Their products can be a good option for wheel wells and other plastic car components.
- Rustoleum Universal: Rustoleum Universal is a versatile paint that can be used on various surfaces, including plastic. It is known for its durability and adhesion. For the best results and long-lasting finish, it is recommended to use a plastic primer first, although some users have reported success without a primer.
- Eastwood Paint Pre: This product is specifically designed to prepare plastic surfaces for painting. It softens the plastic, enhancing the adhesion of the paint and resulting in a stronger bond. Using Eastwood Paint Pre before applying your chosen paint colour can lead to better results.
- High-Temp Grill Paint: For a durable and heat-resistant finish, consider using a high-temp grill paint. This type of paint is designed to withstand high temperatures, making it suitable for wheel wells that may be exposed to heat.
- Rubberized Undercoating: Applying a rubberized undercoating before painting can help reduce road noise and protect the paint from chipping. It provides a flexible and impact-resistant layer that can extend the life of the paint job.
Preparation and Technique:
Before painting plastic wheel wells, proper preparation is key to ensuring a smooth and long-lasting finish:
- Clean the Surface: Start by thoroughly cleaning the wheel wells to remove any dirt, grease, or road grime. Use a suitable cleaner, such as dish soap, engine degreaser, or a plastic/vinyl cleaner.
- Strip Old Paint: If there is existing paint on the wheel wells, strip it using a paint stripper like Citristrip. This step ensures a smooth surface for the new paint to adhere to.
- Dry and Warm the Plastic: After stripping and cleaning, thoroughly dry the plastic surface. You can use a propane torch to gently warm the plastic, but be careful not to get too close or stay in one spot for too long.
- Sand the Surface: Lightly sanding the plastic surface with fine-grit sandpaper can help create a rough texture that promotes better paint adhesion. It also helps to remove any remaining shine from the original paint.
- Apply Primer: Using a plastic primer before painting is highly recommended, especially if you want the paint job to last. A primer will enhance the adhesion of the paint and provide a longer-lasting finish.
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Preparing the surface
Clean the Wheel Wells: Start by thoroughly cleaning the wheel wells to remove any dirt, grease, or debris. Use a pressure washer or a combination of soap, water, and a scrub brush to get rid of any stubborn grime. You can also use a degreaser or a wax and grease remover for this step. Ensure the wheel wells are completely dry before proceeding to the next step.
Strip Old Paint: If there is any old paint on the wheel wells that needs to be removed, you can use a paint stripper like Citristrip to strip it away. Make sure to follow the instructions on the product you choose and work in a well-ventilated area. Once the paint is removed, dry the surface thoroughly.
Warm the Plastic: Using a propane torch, gently wave it over the plastic surface as if you were using a spray can. Be careful not to hold the torch too close or in one spot for too long. This step helps to soften the plastic, creating a better bond with the paint.
Scuff or Sand the Surface: To further enhance paint adhesion, use fine-grit sandpaper or Scotch pads to scuff up the surface of the plastic. This process creates a rougher surface for the paint to adhere to. You can also use a wire brush or a wire wheel to prepare the surface, especially if there is any rust or corrosion present.
Apply a Primer: Although not mandatory, using a plastic primer before painting can help the paint adhere better and create a more durable finish. Choose a primer specifically designed for use on plastic surfaces and apply it according to the manufacturer's instructions.
Once you have completed these steps, your plastic wheel wells should be adequately prepared for painting. Remember to work in a well-ventilated area and wear the appropriate safety gear, including gloves and eye protection, during the preparation process.
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Preventing overspray
Painting plastic wheel wells can be a tricky process, and one of the most important steps to ensure a clean finish is to prevent overspray. Here are some detailed instructions to help you avoid overspray when painting plastic wheel wells:
Firstly, it is important to work in a well-ventilated area, such as an open garage, to ensure proper airflow during the painting process. Before you begin spraying, use a drop cloth to cover the surrounding areas of the wheel wells and the car itself. This will help catch any potential overspray and protect other parts of the car.
Next, carefully remove the wheel from your car. This will give you better access to the wheel wells and make it easier to apply the paint evenly. Once the wheel is removed, use painter's tape and masking paper to mask off the surrounding frame and rotor to protect them from overspray. Take your time with this step to ensure that all areas are properly covered.
Additionally, you can use plastic sheeting or cardboard to cover larger areas of the car, providing an extra layer of protection. Make sure to press down the edges of the tape firmly to create a tight seal and prevent any paint from seeping underneath. It is also recommended to have some clay or putty on hand, as it can be useful for quickly fixing any minor overspray issues that may occur during the painting process.
Before you start painting, it is crucial to test your spray pattern and technique on a piece of cardboard or scrap material. This will help you get a feel for the sprayer's settings and the distance you should maintain from the surface for optimal paint application. Remember to always follow the manufacturer's instructions for the specific paint you are using, as different products may have varying recommendations for application techniques and drying times.
By following these steps and taking your time to carefully mask off and protect the surrounding areas, you can effectively prevent overspray when painting plastic wheel wells. Remember to work in a well-ventilated area and always prioritize your safety by wearing the appropriate protective gear, including a respirator, gloves, and eye protection.
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Using a primer
When it comes to painting plastic wheel wells, using a primer is an important step to ensure the paint adheres properly and the finish is durable. Here's a step-by-step guide on how to use a primer when painting plastic wheel wells:
Prepare the Work Area and Wheel Wells:
Before you begin priming, it's essential to work in a well-ventilated area, such as an open garage. Place your vehicle in a well-lit and spacious work area. Remove the wheels from your car and use painter's tape and masking paper to cover the surrounding frame and rotor, protecting them from any primer or paint overspray. This will ensure that only the desired areas are primed and painted.
Clean and Prepare the Surface:
Start by thoroughly cleaning the wheel wells to remove any dirt, grease, or road grime. You can use a product specifically designed for this purpose, such as a wax and tar remover, or a degreaser. After cleaning, lightly scuff the surface with sandpaper or a Scotch-Brite pad to create a slightly rough surface. This step will help the primer adhere better to the plastic. Make sure to wipe away any dust or debris created during the sanding process.
Choose the Right Primer:
Select a primer that is suitable for plastic surfaces and compatible with the type of paint you plan to use. Look for primers specifically designed for automotive use or plastic adhesion. You can choose a primer that matches the colour of your paint or opt for a clear primer if you're unsure about the final colour.
Apply the Primer:
Follow the instructions on the primer can for proper application. Typically, you'll want to shake the primer can well before use. Hold the can about 12-16 inches away from the wheel well and spray in steady, sweeping motions. Apply a thin, even coat of primer to the entire surface of the wheel well. Allow the primer to dry completely according to the manufacturer's instructions before moving on to the next step.
Lightly Sand the Primed Surface (Optional):
Once the primer is dry, you may optionally lightly sand the primed surface with fine-grit sandpaper. This step can help create an even smoother finish and improve paint adhesion. Be sure to remove any sanding dust with a tack cloth or a damp cloth before proceeding to the painting stage.
By following these steps and using a primer, you'll create a strong foundation for your paint, ensuring that it adheres properly to the plastic wheel wells and results in a durable and aesthetically pleasing finish. Remember to work in a well-ventilated area and always follow the safety instructions on the primer and paint products you choose.
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Dealing with rust
Removing Rust:
Start by removing any loose paint around the rust spot using sandpaper, an electric sander, a grinder with a sandblaster wheel, or a similar tool. This step is crucial and time-consuming, as you need to ensure all the paint that is coming off easily is removed. Once you've taken off the paint, focus on the rust. Cut off any large pieces that are rusted through, and then work on removing the surface rust until you reach the sheet metal. It is important to wear a face mask during this process, as rust dust and metal dust are harmful.
Filling and Sanding:
After removing the rust, apply a wire mesh to any areas where you removed large chunks of metal. Then, apply Bondo, a type of filler, to these areas, following the instructions on the container. Add more Bondo where you cut out big chunks, and less where there was only surface rust. Once the Bondo is applied, it's time to sand. Start with rough sandpaper, and as you get closer to the desired smoothness, switch to softer sandpaper to create a smooth finish. Remember to wear a face mask or even a gas mask during this step, as the Bondo particles can get everywhere.
Painting:
Before painting, ensure the surface is clean and apply a primer to create an even smoother surface and serve as an undercoat for the paint. Then, you can apply your chosen paint. Make sure to follow the instructions on the paint container, including allowing adequate drying time between coats. It is also important to wear a mask while painting to protect yourself from paint fumes.
Preventative Measures:
To reduce the formation of rust on wheel wells, regular cleaning and maintenance are essential. Implement a weekly washing schedule, spraying down the undercarriage to remove any accumulated dirt, debris, or grime. You can also use an all-purpose cleaner to dissolve tree sap, bugs, and other hard, stuck-on substances. Additionally, consider using an undercarriage spray or a water-repellent solution to provide extra protection. If you live in an area with salted roads, it is especially important to keep your wheel wells clean and protected to prevent rust.
Professional Repairs:
In some cases, rust damage may be extensive, and it is advisable to seek professional help. Body shops can cut and weld in patch panels, and then blend everything with bodywork and paint work. This can be costly, and it is important to consider the value of the car and whether it is worth investing in extensive repairs.
Remember, dealing with rust requires patience and attention to detail. Take your time and work systematically to ensure the best results and prevent the rust from returning.
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Frequently asked questions
Krylon paints for plastic, Rustoleum Universal, and SEM plastic/vinyl paints and dyes are all recommended for painting plastic wheel wells.
To prevent over-spray, you can paper and tape off the area around the wheel well.
To prepare plastic wheel wells for painting, you can clean them with dish soap, engine degreaser, or a wax and grease remover. You can also use a product like Eastwood Paint Pre to soften the plastic and help the paint adhere better. If you want the paint to last longer, you can use a plastic primer first.
For the inside of plastic wheel wells, you can use a rubberized coating or a product like POR-15.
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