Fixing Cloudy Headlights: A Real-World Guide to Clear Vision (Mar 2026)

Give the headlights and the surrounding panels a proper wash. You don't want any red dust or grit getting under your sandpaper and deep-scratching the plastic. Dry it off thoroughly.

This is the most important step. Tape off the paintwork around the headlight. Use two or even three layers of tape. I learned this the hard way on a black Commodore years ago, one slip of the sandpaper and you've just given yourself a three-hour polishing job on the bumper. Not fun.

If you can, pop the bonnet. It usually gives you better access to the top edge of the light and keeps your sandpaper away from the underside of the hood.

Soak your 800-grit paper in your water bottle for 5 minutes. Spray the headlight generously and start sanding in horizontal motions. It'll look terrible, white slurry will come off. This is the old, dead UV coating. Keep going until the entire lens has a uniform, cloudy look.

Wipe the lens dry. If you see any remaining yellow spots or clear patches, keep going with the 800. You need that old coating 100% gone before moving on.

Now switch to 1500-grit. This time, sand vertically. By changing direction, you can see when you've sanded out the scratches from the previous 800-grit stage. Keep it wet, heaps of water is your friend here.

Go back to horizontal sanding with the 2000-grit. The plastic should start looking a bit more translucent now. It won't be clear yet, but it'll feel much smoother to the touch.

Finish with the 3000-grit. Some people reckon you can stop at 2000, but I've found 3000 makes the polishing stage so much faster and easier. Sand in vertical strokes until it's as smooth as glass.

Dry the lens completely. Apply a few pea-sized drops of your heavy cutting compound to a clean microfibre or a foam applicator. Work it in hard with small circular motions. You'll start to see the clarity return almost instantly. (It's pretty satisfying, I gotta say.)

Wipe away the compound residue and repeat the process with your finishing polish. This removes the tiny haze left by the compound and gives it that crystal-clear 'showroom' look.

Spray some Isopropyl Alcohol onto a clean towel and wipe the lens down. This removes all the oils from the polish so your sealant can actually stick to the plastic.

Apply your UV protectant or ceramic coating. If you skip this, the lights will turn yellow again in three months. I personally swear by Gtechniq C4, it's a bit pricey but it lasts ages in the Aussie heat.