Ethan Clarke
Faded plastic headlights can be a safety hazard, impairing your vision at night and putting you and your passengers in danger. Fortunately, they are easy to restore, and you can do it yourself without spending a lot of money at a mechanic. The cloudiness is caused by the oxidation of the plastic, which is primarily caused by prolonged exposure to UV rays from the sun, as well as environmental factors such as road debris, dirt, and harsh chemicals. Regular cleaning and polishing can help mitigate these effects, but if your headlights are already foggy, you can restore them by sanding and applying a UV sealant.
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What You'll Learn
- Clean the headlights with mild detergent and a soft brush or sponge
- Dry the headlights and apply masking tape to protect the surrounding area
- Use a restoration kit with sanding pads or sandpaper to remove the foggy layer
- Apply a UV sealant to protect the headlights from further damage
- Finish with a buffing wheel or polishing pads to add shine
Clean the headlights with mild detergent and a soft brush or sponge
To restore your faded plastic headlights, you must begin the restoration process with as spotless a surface as possible. Wash the headlights with a mild detergent and a soft-bristle brush or sponge. Flush the headlights with plenty of water and dry them. You can also use toothpaste to clean the headlights.
It is important to note that you should never clean clear plastic with any chemical that is not formulated for the task, including car waxes or polishes. Before proceeding with the next steps, ensure that the headlights are completely dry.
After cleaning the headlights, you can apply a lens clarifying compound to your buffing pad and rub the headlights with moderate pressure. You can also use power tools such as a cotton buffing wheel on an angle grinder or a felt roloc polishing pad with a drill or die grinder. Remember to always run these tools on a low setting to avoid damaging the plastic surface.
Once you have cleaned and buffed the headlights, you can move on to the sanding process, which is a common method for restoring headlights.
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Dry the headlights and apply masking tape to protect the surrounding area
Before you start restoring your faded plastic headlights, it's important to dry the headlights and apply masking tape to protect the surrounding area. This will help prevent any damage to the paintwork or trim from the abrasives or compounds you'll be using to restore the headlights.
Start by washing the headlights and the surrounding area to remove any bugs, grime, or dirt. You can use warm soapy water or a mild detergent and a soft-bristle brush or sponge. Rinse the area with plenty of water and then dry it thoroughly.
Once the area is clean and dry, you can apply the masking tape. Use a good quality masking tape or painter's tape and mask off an inch or so around the headlights. Make sure to get tape into all the recesses while avoiding the surface of the lenses. This will create a barrier that will protect the surrounding paintwork or trim from scratches or damage.
It's important to take your time during this step to ensure that the tape is securely in place. This will help ensure that the restoration process is safe and effective, and it will also help you achieve the best possible results.
After taping off the area, you can move on to the next steps of the headlight restoration process, such as applying a lens clarifying compound or polishing the headlights. By following these steps, you can effectively restore your faded plastic headlights and improve their clarity and performance.
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Use a restoration kit with sanding pads or sandpaper to remove the foggy layer
If your car's plastic headlights have become foggy, you can restore them using a restoration kit with sanding pads or sandpaper. This process involves removing the foggy layer of oxidation caused by UV rays, and polishing the headlights to restore their clarity.
Before you begin, it's important to clean the headlights and the surrounding area to remove any bugs, grit, or grime. You can then apply masking tape to protect the area surrounding the headlights from scratches.
If your headlights have deep scratches or are heavily oxidised, you may need to start with a lower grit sandpaper, such as 400-grit. Dry sand the headlight in a consistent pattern, applying even pressure, until the surface is evenly hazy. This process removes the surface-level oxidation and exposes the clear plastic underneath.
Next, you can move on to wet sanding, which is ideal for polishing. Apply water to the surface of the headlights, as it acts as a natural lubricant and helps keep debris from clogging the sandpaper. Use a higher grit sandpaper, such as 600-grit, and sand in straight lines in the opposite direction of the previous step. Continue to use finer grit sandpaper, such as 1,000-grit, and spray down the surface before lightly wet sanding.
After the final phase of wet sanding, the surface should be smooth but may still be hazy. You can then use a dual-action polisher with a wool or foam pad to apply a polishing compound. This will remove the hazing and light scratches, leaving a clear and shiny surface.
Finally, remember to apply a protectant after restoring your headlights to prevent them from turning yellow again. You can use a lens base coat wipe, followed by a lens sealing wipe, to protect your headlights and maintain their clarity.
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Apply a UV sealant to protect the headlights from further damage
To restore faded plastic headlights, you must first wash the headlights and the surrounding area to remove any bugs and grime. After drying the area, apply masking tape to protect the area surrounding the headlight. Then, use a buffing pad with a lens clarifying compound to rub the headlights with moderate pressure. Next, buff the headlights with a clean cloth and repeat the process if necessary.
If your headlights are still foggy, you can use a headlight restoration kit, such as the Turtle Wax kit, which includes sanding pads and spray lubricant. Work through all grades of pads, from the lowest to the highest, spraying lubricant and wiping the headlights between grades. Once you have worked through all the grades, the plastic surface should be smooth, but still hazy.
To remove the haze, you will need to use a selection of restoring, polishing, and refining compounds, such as the Revitalise System. This process will remove the haze and light scratches, leaving a clear and shiny surface. If further refinement is required, you can use a product such as Triple All-in-one Polish.
Finally, to protect your headlights from further damage, you should apply a UV sealant. Here are some options for products you can use:
- Cerakote Headlight Coating wipes: These wipes are designed to provide UV protection for plastic headlamps and can be stretched to cover two headlights if they are small.
- Jet Seal: A sealant product that can be used to protect headlights from UV damage.
- Glasweld Gclear: Another product that can be used to seal and protect headlights from UV rays.
- HBC System UV-Protective Coating: This is a ready-to-use aerosol that contains 400 ml of UV coating suitable for all types of polycarbonate plastic headlights. HBC System guarantees that headlights treated with this coating will remain clear for one year.
- KAVACA Ceramic Coated PPF: This is a paint protection film (PPF) that can be applied to headlights to provide maximum protection. It is composed of polymers that are resistant to damage from oils, scratches, and UV light. It will create a hydrophobic surface and improve clarity.
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Finish with a buffing wheel or polishing pads to add shine
To finish restoring your faded plastic headlights, you can use a buffing wheel or polishing pads to add shine.
Using a Buffing Wheel
If you are using a buffing wheel, you can apply the polish directly to the headlight and then smear the compound all over the headlight. Alternatively, you can apply the polish to the buffing wheel and then spread it over the headlight. You can use a cotton buffing wheel on an angle grinder. If you are using a drill, you can use a buffing compound bar with the wheel.
Using Polishing Pads
If you are using polishing pads, you can use felt roloc polishing pads with a drill or die grinder. If you are using a drill, you can use a blue rouge buffing compound bar with the felt roloc polishing pads. You can also use a foam waffle pad, but if you use a wool pad, go slowly and check to make sure you are not cutting too hard with it.
Final Steps
After using a buffing wheel or polishing pads, you can use a microfiber cloth to wipe down the entire headlight. Check from multiple angles to ensure that the surface looks even, shiny, and bright. Then, remove the tape. You can also apply a UV sealant to keep the headlights from oxidizing again. Apply at least three coats to preserve the shine.
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Frequently asked questions
Plastic headlights are coated with a UV protective film by manufacturers. Over time, exposure to UV radiation from sunlight causes chemical reactions in the plastic, breaking down the bonds and leading to oxidation and cloudiness.
To prevent your plastic headlights from becoming cloudy, park your car in the shade whenever possible. Regularly washing your car with a mild detergent and polishing your headlights a few times a year can also help mitigate the effects of oxidation.
You can either buy a headlight restoration kit, which includes all the necessary materials, or purchase the items individually. You will need wet/dry sandpaper in varying grits (1000, 2000, and 3000), polishing compound, paste wax, UV sealant, painter's tape, and microfiber towels.
First, wash the headlights and the surrounding area to remove any bugs and grime. Dry the area and apply painter's tape to protect the surrounding paint or trim. Then, sand the lenses with the sandpaper, wetting both the sandpaper and the headlight. Start with the most abrasive grit and sand in straight, horizontal strokes, keeping the surface wet. After sanding, apply a polishing compound and UV sealant to protect the headlights from oxidizing again.
Yes, you can use power tools such as a cotton buffing wheel on an angle grinder or a felt roloc polishing pad with a drill. Just be sure to use a low setting to avoid damaging the plastic surface.
