Omar Khalid
Painting a plastic hood scoop can be a tricky endeavour, especially if you're unsure of the type of plastic you're dealing with. The first step is to identify the plastic type, which can be done through a burn test or by checking the abbreviation on the back of the scoop. Once the plastic type is known, the appropriate prep steps can be determined. Some common prep methods include sanding, using an adhesion promoter, or a plastic prep product. It's important to clean the surface thoroughly before painting, and some sources recommend using a wax and grease remover. When it comes to paint, a few options are available, including urethane, epoxy, or plastic-specific paint like Krylon Fusion. It's recommended to apply several light coats of paint rather than one thick coat. After painting, some light sanding and buffing can be done to achieve the desired finish.
How to paint a plastic hood scoop
| Characteristics | Values |
|---|---|
| Paint | Semi-gloss black urethane, Flat Black, Krylon Fusion, Hot Rod Black |
| Primer | Epoxy primer, Bulldog adhesion promoter, Lacquer primer, Plastic etching paint |
| Sanding | 400 grit sandpaper, 500 grit sandpaper, 600-800 grit sandpaper, 1000 grit sandpaper, 2000 grit sandpaper |
| Other tools | Wax and grease remover, Tack rag, Paint thinner/rubbing alcohol |
| Paint application | Spraying, Brushing |
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What You'll Learn
Sanding the hood scoop
Before you start sanding, it is important to determine the type of plastic your hood scoop is made of. This is because different types of plastics may require different sanding techniques and grit sizes. For example, if your hood scoop is made of thin, flexible plastic, you may need to be more gentle during the sanding process to avoid damaging the surface.
Once you have identified the type of plastic, you can choose the appropriate grit sandpaper for the job. Some people recommend starting with a finer grit sandpaper, such as 400-grit, to scuff the surface and create a smooth base for the paint. Others suggest using a slightly coarser grit, such as 500-grit or 600-grit, to sand down the surface of the hood scoop before applying a primer.
It is important to sand the hood scoop thoroughly and evenly, ensuring that you cover all the areas that will be painted. Pay extra attention to any areas with scratches or imperfections, as these may require more sanding to create a smooth surface. After sanding, it is a good idea to wipe down the surface with a tack rag or a wax and grease remover to remove any dust or residue.
Depending on the type of paint and primer you are using, you may need to sand the hood scoop again between coats. For example, some people recommend sanding with 1000-grit sandpaper after applying a couple of coats of primer. This helps to create a smoother surface for the final coats of paint. Finally, once you have applied the final coats of paint, you may want to finish the job with light wet sanding and buffing to achieve a smooth and glossy finish.
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Choosing the right primer
Type of Plastic
The type of plastic your hood scoop is made of will determine the best primer to use. The most common type of plastic used for aftermarket hood scoops is ABS plastic, which is known for its ease of painting. If you are unsure about the specific type of plastic, you can check for markings or abbreviations on the scoop itself or refer to the manufacturer's information.
Adhesion Promoter or Primer
Some sources suggest that an adhesion promoter can be used instead of a traditional primer. Bulldog adhesion promoter is a popular choice, and it can be applied after scuffing the plastic with sandpaper. However, it is recommended to do a burn test or consult a motor collision repair guide to determine the exact type of plastic and its recommended preparation steps.
Lacquer Primer
Lacquer primer has been suggested by paint store professionals as it "melts" into the plastic, providing a good base for the subsequent primer and paint. However, some people are skeptical of this method and prefer to use other types of primers.
Epoxy Primer
Epoxy primer has been successfully used to prime plastic hood scoops. One person reported that they painted their plastic scoops with epoxy primer and urethane paint, and the results held up well over several years.
Plastic-Specific Paint
In some cases, a separate primer may not be necessary if you use a plastic-specific paint. Krylon Fusion is a popular option that comes in various colours and does not require a clear coat. It cures over time, becoming chip and scratch-resistant within 7 days of painting.
Remember, the key to choosing the right primer is understanding the type of plastic you are working with and selecting a compatible product. Always refer to the manufacturer's instructions and recommendations for the specific plastic of your hood scoop.
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Selecting the paint type
Selecting the right paint for your plastic hood scoop is crucial to achieving a long-lasting and aesthetically pleasing finish. Here are some factors to consider when choosing the paint type:
Type of Plastic
Different types of plastics may require specific types of paint and preparation methods. For instance, the majority of aftermarket stick-on plastic hood scoops are made of ABS plastic, which is generally considered one of the easiest types of plastic to paint. However, it is always a good idea to check the manufacturer's recommendations or consult a professional if you are unsure about the type of plastic you are working with.
Paint Compatibility
It is essential to use paint that is specifically designed for use on plastic surfaces. Some paints, such as Krylon Fusion, offer a range of colours specifically formulated for plastic, which can provide a durable finish without the need for a clear coat.
Surface Preparation
Proper surface preparation is key to ensuring the paint adheres well to the plastic. Depending on the type of plastic, you may need to sand the surface, use an adhesion promoter, or apply a primer. For example, a lacquer primer has been recommended for its ability to "melt" into the plastic, providing a good base for the paint. However, some people are skeptical of this method, and it is always recommended to test on a small area first to ensure compatibility with your specific plastic hood scoop.
Finish and Durability
Consider the desired finish for your hood scoop. A semi-gloss or flat black finish is a popular choice for a sleek and subtle look. Additionally, using a hardener can give the paint a more flexible finish, which is ideal for surfaces that need to flex, like plastic hood scoops.
Application Method
The application method you choose will also impact the type of paint you select. Spray paint is a common choice for plastic hood scoops, but it may require multiple coats to achieve the desired coverage and depth of colour. Alternatively, you can use a paint gun, which can provide a finer mist and a more even finish, though it may be more costly and require professional equipment.
Remember, it is always recommended to do a small test patch before committing to a specific paint type, as this will ensure the paint is compatible with the plastic and will deliver the desired results.
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Applying the paint
Painting a plastic hood scoop can be a tricky process, but with the right tools and preparation, it can be done successfully. Here is a step-by-step guide to applying the paint:
Firstly, it is important to prepare the surface of the plastic hood scoop. This can be done by sanding the surface with grit sandpaper, typically ranging from 500 to 1000 grit, to create a rough texture that will allow the paint to adhere better. It is recommended to sand the scoop thoroughly and create an even surface. Some sources suggest using a plastic etching paint or a prep wipe specifically designed for plastic surfaces to enhance paint adhesion. It is also essential to clean the surface with a wax and grease remover to ensure that the paint will stick properly.
Once the surface is prepared, it is time to apply the primer. A primer will help the paint adhere better and provide a more durable finish. There are different types of primers available, such as lacquer primer, epoxy primer, or a plastic adhesion promoter. The choice of primer depends on the type of plastic and personal preference. It is recommended to apply a couple of light coats of the primer, following the instructions on the product.
After the primer has dried, it is now time to apply the paint. Select a paint that is specifically designed for plastic surfaces, such as Krylon Fusion, which offers a wide range of colours and does not require a clear coat. It is important to follow the manufacturer's instructions for the specific paint chosen. Typically, it is recommended to apply several light coats of paint, rather than one heavy coat, to ensure an even and smooth finish. Allow each coat to dry before applying the next one.
Once the final coat of paint has been applied, it is important to let it cure completely. This can take several days, depending on the paint type and environmental conditions. Refer to the paint manufacturer's instructions for the recommended curing time. After the paint has cured, a clear coat can be applied for added protection and a glossy finish. Similar to the paint, it is essential to apply light coats of the clear coat to prevent bubbling or other imperfections.
Finally, once the clear coat has dried, light sanding and buffing can be done to achieve the desired finish. This step is optional but can enhance the overall appearance of the painted hood scoop. Remember to use fine-grit sandpaper and a buffing compound to achieve a smooth and glossy finish.
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Finishing touches
Now that you've painted your plastic hood scoop, it's time to put it back on your car and stand back to admire your handiwork! But before you do, there are a few finishing touches you might want to consider to really make your scoop pop and ensure a long-lasting paint job.
Clear Coat
Applying a clear coat is optional, but it can add an extra layer of protection to your paint job and give it a glossy finish. Some paints, like Krylon Fusion, don't require a clear coat, so be sure to check the instructions for your specific paint. If you do opt for a clear coat, spray 3 to 4 coats and let it cure for at least 24 hours before handling.
Wet Sanding and Buffing
If you want to achieve an ultra-smooth finish, consider wet sanding with a fine grit sandpaper (2000 grit or higher) after your final coat of paint has dried. This will help remove any small bumps or imperfections. Just be sure to use a light touch to avoid damaging your paint job. Follow this up with a good buffing to bring out the shine.
Maintenance
To keep your hood scoop looking its best, regular maintenance is key. This includes washing and waxing it regularly, just as you would the rest of your car. Avoid using abrasive cleaners or scrubbing too aggressively, as this can damage the paint.
Touch-Ups
Even with the best care, your paint job may eventually show some wear and tear. If you notice chips or scratches, you may need to do some touch-ups. Start by cleaning and sanding the affected area, then apply a small amount of paint, being careful to match the color and finish. Let it dry completely before deciding if an additional coat is needed.
Professional Services
If at any point you feel unsure about tackling this project yourself, remember that there are professionals who can help. Body shops and auto paint specialists have the skills and experience to ensure a flawless paint job. They can also provide advice on color matching and paint types. So don't hesitate to reach out for guidance or to have them take on the task if you're unsure.
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Frequently asked questions
The best way to prep a plastic hood scoop for painting is to sand it with grit sandpaper, clean it with paint thinner or rubbing alcohol, and then apply a few coats of primer. Some people also recommend using an adhesion promoter or a plastic etching paint for better adhesion.
There are a few types of paint that can be used for plastic hood scoops, including urethane, epoxy, and plastic-specific paints like Krylon Fusion. It is important to avoid using paint meant for bare metal, as it may not adhere well to the plastic.
It is recommended to apply multiple light coats of paint, rather than one heavy coat. The exact number of coats will depend on the type of paint being used and the coverage desired.
The grit of the sandpaper can vary depending on the stage of the project. For initial sanding, a lower grit sandpaper such as 400 or 600 grit can be used. For between coats of paint, a higher grit sandpaper such as 1000 or 2000 grit can be used for a smoother finish.
