Omar Khalid
Painting plastic car parts is a great way to revamp the exterior of your car. It is important to know how to mask your car before painting it. The first step is to identify the type of plastic you are dealing with as some plastics need special treatment. The next step is to prepare the plastic car parts by removing them from the car's exterior. If removal is not possible, you will need to mask off the surrounding bodywork to prevent overspray. You can use masking tape or plastic to mask the car parts. Masking with plastic saves time and materials, eliminates dust better, and prevents dirt from ruining your paint job.
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What You'll Learn
- Use masking tape for cars (AKA automotive masking tape)
- Cover the car with plastic, stretching it down to within 2 inches of the tire bottoms
- Use plastic to eliminate dust better and save on tape
- Use a suitable primer before painting for a high-standard finish
- If you only want to revitalise your plastic trim, use a heat gun, trim dressings or restorers
Use masking tape for cars (AKA automotive masking tape)
Masking a car with automotive masking tape is a highly precise task that requires careful preparation. It is important to use the right kind of tape to achieve the desired results.
Automotive masking tape is specifically designed for use on cars and other vehicles. It has higher tensile strength and elongation than regular masking tape, allowing it to conform to the curves and irregular surfaces of a car without ripping or breaking. It also has stronger adhesion, providing a better hold on different materials and resisting high temperatures. This ensures that the tape stays in place during the drying cycles of the paint, preventing paint bleeding and providing clean results.
When painting cars, it is crucial to use automotive masking tape rather than regular decorators' masking tape. Cars are made from a variety of materials, including plastic trim, metal panels, rubber tyres, and chrome. These different surfaces require specialist protection to achieve the best results. Automotive paint is typically applied with a spray gun, resulting in a finer finish compared to domestic painting methods. Therefore, the tape must be able to adhere to different surfaces and conform to the curves of the car's bodywork.
Automotive masking tape is designed to meet the specific demands of car painting, such as masking for extended periods, painting over, removing, and re-sticking. It leaves no adhesive residue, ensuring that the paint job is not affected. The tape can be left on for as long as needed without worrying about accidental paint removal. Additionally, its resistance to high temperatures prevents it from coming off during the drying cycles.
When preparing plastic car parts for painting, it is recommended to remove them from the car's exterior if possible. If removal is not feasible, masking off the surrounding bodywork is necessary to prevent overspray and achieve a superior finish. For curved plastic parts, perforated trim masking tape is ideal as it easily conforms to bends. For plastic parts with straight edges or slight bends, precision masking tape is more suitable for masking off surrounding areas.
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Cover the car with plastic, stretching it down to within 2 inches of the tire bottoms
Covering a car with plastic is a superior alternative to using paper, as it saves time and materials, and prevents dirt from ruining your paint job.
To cover the car with plastic, the first step is to prep all the panels as you normally would. Then, cover the car with a large sheet of plastic, stretching it down to within 2 inches of the tire bottoms. This ensures that there is no loose plastic that can cause tripping or get caught in something. Secure the plastic to the tires using 2-inch tape. If the tape won't stick due to tire dressing, simply wrap the tape around the back of the tire.
It is important to stretch the plastic tight to leave no place for dirt or debris to hide and potentially ruin your paint job. Plastic saves on tape as well, and its flexibility makes it easier to work with, especially when masking a van with lots of windows. You can simply cut the plastic to fit the windows, which saves time and tape.
After covering the car with plastic, the next step is to use a new razor blade to carefully cut out the plastic around the area to be painted. This step requires practice, as painters often fear that the paint will flake off the plastic and ruin the paint job. However, if the plastic is stretched tight and taped securely, there is no need to worry about paint flaking off.
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Use plastic to eliminate dust better and save on tape
Masking a car with plastic is a superior alternative to using paper. It saves time and materials, and, most importantly, eliminates the possibility of dust and dirt ruining your paint job.
When using paper, painters have to use various sizes, such as 12-inch, 16-inch, and 36-inch, which requires reloading the tape and paper machine frequently. Plastic, on the other hand, offers a one-size-fits-all solution, reducing the need for reloading. It also stretches tightly, leaving no place for dust or dirt to hide and pop out onto the painted surface.
To mask a car with plastic, first, prep all the panels as you normally would. Then, cover the car with plastic, stretching it down to within 2 inches of the tire bottoms. Secure the plastic to the tires using 2-inch tape. If the tape doesn't stick due to tire dressing, pass it around to the back of the tire. Use a new razor blade to carefully cut out the plastic around the area to be painted. You can also use the plastic to mask the windows, which may take some practice.
It's important to note that some painters are concerned that the paint will flake off the plastic. However, with proper preparation and techniques, this can be avoided. Additionally, using a suitable primer before painting will ensure a high-quality finish without the need for reworking.
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Use a suitable primer before painting for a high-standard finish
Painting plastic car parts can help improve the visual appeal of the car by seamlessly integrating with the car's exterior or interior. It also creates a protective barrier that shields the car from the effects of environmental conditions, such as moisture and UV radiation.
To achieve a high-standard finish, it is crucial to use a suitable primer before painting plastic car parts. A suitable primer will ensure that the paint adheres well to the plastic surface and results in a durable finish. Here are some essential steps to follow when using a primer:
Firstly, select a high-quality primer specifically designed for plastic surfaces. Look for primers that offer excellent adhesion to plastic and are compatible with the type of paint you intend to use. Automotive-grade paints, for example, require automotive plastic primer.
Before applying the primer, ensure that the plastic surface is clean, dry, and free of any contaminants. Use a mild-action detergent or a recommended plastic cleaner to remove dirt, dust, or grease. If the plastic part has been removed from the car, secure it in a location where you can paint without handling it.
When applying the primer, follow the manufacturer's instructions for the best results. Shake the primer filler as instructed and lay down two coats at 5-minute intervals. Apply the primer from around 6-7 inches away from the plastic part. During this process, it is recommended to wear a mask to protect yourself from the chemicals in the primer.
After applying the primer, allow it to dry completely according to the manufacturer's instructions. The primer must be given sufficient time to cure properly before proceeding with the painting process. Once the primer is dry, you can lightly sand the surface to ensure maximum adhesion and a smooth finish.
By following these steps and using a suitable primer, you will create an excellent foundation for the paint, resulting in a high-standard and long-lasting finish for your plastic car parts.
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If you only want to revitalise your plastic trim, use a heat gun, trim dressings or restorers
If you only want to revitalise your plastic trim, there are several methods you can use. One popular method is to use a heat gun. This method involves heating the plastic to its glass-transition temperature, which allows the plastic molecules to move around and restore the colour of the plastic trim. It is important to be cautious when using a heat gun as repeated heating can damage the plastic and make it turn grey and dull. It is recommended to hold the heat gun 3 inches away from the plastic trim and use a high heat setting.
Another method is to use trim dressings, which can improve the appearance of your car's trim. However, dressings need to be applied almost every time you wash your car, as they wash away after 3-6 weeks. Most trim dressings will also leave stains when they get wet and run down the side of your car.
A more long-lasting solution is to use a plastic restorer like Solution Finish Trim Restorer. This product can be applied using a microfiber applicator or foam applicator onto clean plastic trim. It is important to ensure that there is no residue on the trim before applying the restorer. After application, wipe off any excess product and allow the plastic to dry for at least 4 to 6 hours before washing the treated area.
Additionally, you can use a plastic sealer like Solution Finish Over The Top Plastic Sealer to protect the plastic trim from harmful UV rays and prevent fading and deterioration. This product can be used as a standalone treatment or as a topper on plastics that have been treated with a restorer.
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Frequently asked questions
The best way to prepare plastic car parts to be painted is to first remove them from the car’s exterior. If removal isn’t possible, you can use masking tape to mask off the surrounding bodywork to prevent overspray. For curved parts, use perforated trim masking tape, and for straight edges, use precision masking tape.
First, you need to clean the area with a wax and grease remover, window cleaner, soapy water, or plastic solvent. Then, sand off any paint and rough edges. If you need to remove paint, use a chemical stripper and follow the manufacturer's instructions. Once the paint is removed, apply a primer, then spray paint, and finally, clear lacquer.
Small cracks or breaks in plastic car parts can be fixed with epoxy, a viscous polymer that hardens over time when mixed with a curing agent. For larger cracks, use mesh tape across the crack to support the epoxy, and apply the epoxy in layers.
