Omar Khalid
Scratches on plastic fenders are a common issue, especially if you drive often. While some suggest that scratches on textured plastic fenders are difficult to fix, there are several methods you can use to restore them. This includes using a heat gun, which softens the plastic and minimises the appearance of scratches. Other methods include using products such as Meguiar's D17001 Hyper Dressing, TriNova restorer, or sandpaper to buff away the scratches.
Characteristics and Values Table for Restoring Scratched Plastic Fenders
| Characteristics | Values |
|---|---|
| Prevention | Protect the vehicle when off-road driving or when coming into contact with snow, mud or other debris |
| Keep out of sunlight to prevent drying and cracking | |
| Repair Products | Meguiar's D17001 Hyper Dressing |
| 3M wrap | |
| TriNova restorer | |
| WD40 | |
| Krylon fusion spray paint | |
| Glazing putty | |
| Plastic filler | |
| Sandpaper | |
| Heat gun |
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What You'll Learn
Cleaning the fender
To clean a plastic fender, you will need a bucket of warm water mixed with 1/4 cup of dishwashing soap. Dip a sponge into this solution and clean the fender flare, paying extra attention to removing dirt and debris from the scratches. You can also use big fluffy heads for polishers for this step. Ensure that the fender is free of dirt, bugs, and residue before proceeding to the next steps.
Another method to clean the fender is to use a heat gun. This method will soften the plastic and minimise scratches. However, it may also leech out oils in the plastic and create shiny spots that cannot be undone. It is important to exercise caution when using a heat gun and to start with a low-temperature setting. Begin by holding the heat gun about a foot away from the fender and slowly move it closer until the finish brightens and smoothens.
If you are looking for a simpler solution, you can try using WD-40. Put some WD-40 on a rag and wipe it onto the scratches to darken and conceal them. Alternatively, you can use a black crayon, a black china marker, or shoe polish to hide the scratches.
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Using plastic filler
If you're looking to repair scratches on a plastic fender, one method you can use is plastic filler. This method is ideal for deep scratches that are more like gouges in the plastic. It's a permanent solution, so it's important to get it right the first time.
First, you'll want to clean the scratched area. Use a plastic prep solvent and a special wipe or cleaning spray to sanitize the scratch and the surrounding area. Make sure to wipe down the entire area to remove any dirt or grime that may be stuck in the scratch.
Next, you'll need to apply the plastic filler. Scoop a small amount of the filler onto a new razor blade and begin applying it along the surface of the scratch in long, flat motions. Hold the blade at a 45-degree angle to create a smooth, even layer. Continue working in long, back-and-forth motions until the scratch is completely filled.
Once the filler is applied, you'll need to wait for it to dry completely. Read the instructions on your plastic filler to see the recommended drying time. Some products may be dry to the touch in 20 minutes, while others may need more time to harden completely.
After the filler has dried, you can begin to sand the surface. Use coarse 80- and 120-grit sandpaper to remove any obvious dust or rough areas from the hardened filler. Then, use a smoother, 120-grit piece of sandpaper to even out the plastic and create a polished finish. If you're working on a larger project, like a car bumper, you may need to use 400-grit sandpaper as well.
Finally, you can apply a coat of primer and surfacer to the filled plastic. Spray the entire area with the primer, covering both the repaired section and the surrounding areas. Wait for it to dry, and then apply a second coat.
By following these steps, you can use plastic filler to effectively repair deep scratches on plastic fenders, restoring them to a smooth and polished finish.
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Sanding and polishing
Begin by cleaning the plastic fender with a mixture of dish soap and warm water to remove any dirt or debris. Rinse and dry the area thoroughly. Once the surface is clean and free of contaminants, you can start the sanding process.
Use a wet sandpaper with a grit of around 50-1500, depending on the depth of the scratches. Start sanding in the direction of the scratches, working in long, even strokes. Gradually work your way across the scratch, being careful not to apply too much pressure, which can create divots. Continue sanding until the scratch is no longer visible, and the surface feels smooth to the touch.
After sanding, you can apply a plastic filler to the affected area to restore its original shape. Use a putty knife to smooth out the filler, ensuring it fills the entire scratch. Allow the filler to harden for at least 24 hours.
Once the filler has hardened, you can begin polishing. Apply a small amount of plastic polish to a soft cloth and buff the repaired area in circular motions. Work the polish into the scratches until they become less visible, and the polish is no longer visible.
For a more permanent solution, consider using a heat gun on its lowest setting to soften the plastic and minimize the appearance of scratches. This method should be approached with caution, as it can leech out oils in the plastic, creating shiny spots that cannot be undone. Always test on a small, hidden area first.
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Applying heat
Using a heat gun is a popular method for restoring scratched plastic fenders. This method involves applying heat to the scratched area, softening the plastic, and reducing the appearance of scratches. It is important to note that this technique may not be suitable for deep scratches, as it can cause more damage to the plastic.
To use the heat gun method, start by cleaning the plastic surface with a shop towel and rubbing alcohol to remove any oils or dirt that may interfere with the process. Ensure the area is completely clean and dry before proceeding.
When using the heat gun, always start with the lowest heat setting and maintain a safe distance of about 1 foot from the plastic surface. Gradually move the heat gun closer, aiming for an area the size of the gun itself. Apply heat in a circular motion, moving up and down and side to side. It is crucial never to focus the heat on one spot, as it may melt or deform the plastic.
Continue applying heat until the finish becomes brighter and smoother. Once the desired result is achieved, remove the heat and move on to the next scratched area. Repeat the process as needed. Remember to work in small sections at a time to ensure precise and controlled application of heat.
As a final step, you can use a product like Armol All to shine and protect the treated plastic surfaces. This will enhance the appearance and provide additional protection.
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Spray painting
If you're looking to restore scratched plastic fenders with spray paint, there are a few methods you can try. Firstly, it's important to assess the depth of the scratches. For deeper scratches, it's recommended to remove the plastic panel from the car to make the process easier. If removal is not possible, use automotive masking tape to cover and protect the surrounding areas.
Next, use a razor to cut off any protruding plastic bits from the scratch. You can then sand down the scratch with sandpaper, ensuring you fade it out towards the intact plastic to maintain its texture. After sanding, clean the surface with a microfiber towel and a car cleaner to remove any debris, dirt, and grime.
Now, you can move on to the spray painting. Krylon Fusion spray paint is specifically recommended for plastic auto parts. Ensure the paint you choose is identical to the original paint on the fender. Spray the entire panel and let it dry.
Alternatively, you can use a heat gun on a low setting to soften the scratches. However, be cautious as too much heat can cause damage. You can also try using a black crayon, black china marker, or shoe polish to hide the scratches without sanding or painting.
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Frequently asked questions
One option is to use a heat gun on a low setting to soften the scratches and minimise their appearance. You can also try coating the scratches with a product like Meguiar's D17001 Hyper Dressing or 303, which can help reduce their visual impact.
You can use plastic filler putty to fill in the scratches. Smooth the filler out with a putty knife, then let it harden for 24 hours. After that, use coarse sandpaper to smooth out the filled-in area, then apply plastic polish to a soft cloth and buff the area until the polish is no longer visible.
Yes, there are products on the market that claim to restore the plastic finish, such as TriNova restorer and Plastic-X from Meguiars. These products can help improve the colour and sheen of the plastic.
