What You'll Learn
Aussie Conditions
Look, we've all seen those cars at the servo with headlights so yellow they look like they've been dipped in butter. It's a classic Aussie problem thanks to our brutal UV levels and that salty coastal air. This guide is for anyone who wants to stop squinting at the road and get their car looking sharp again without spending $800 on new housings. I'll walk you through the proper way to sand and seal them so you don't have to do it all again in three weeks.
Why Your Lights Look Like Garbage
The Gear You'll Actually Need
What You'll Need
While you're here...
Preparation: Don't Be Lazy
Clean the area
Give the headlights and the surrounding panels a proper wash. Any dirt or red dust left behind will act like extra grit and ruin your finish.
Masking is non-negotiable
Double-tape or even triple-tape the paintwork around the light. I learned this the hard way on a black Commodore years ago, one slip of the sandpaper and you're looking at a $500 paint touch-up. Not worth the risk.
Check the weather
Don't do this in the direct sun. If the plastic gets too hot, the sandpaper will gum up and the polish will dry out before it can do its job. Find some shade or wait until the arvo when it's cooled down.
The Main Procedure: Getting To Work
The 800 Grit Stage
Soak your 800-grit paper for 10 minutes. Spray the light down and start sanding in horizontal lines. You'll see a nasty yellow slurry coming off, that's the dead plastic. Keep going until the whole light looks uniformly milky and all the yellow is gone.
Switching Directions
Wipe it clean, then move to 1500-grit. This time, sand vertically. By changing directions, you can see if you've sanded out all the scratches from the previous, coarser grit.
Refining with 2500 Grit
Repeat the process, going back to horizontal. The 'milk' coming off should be white now, not yellow. The light will start looking a bit more translucent.
Finishing with 3000 Grit
This is the final wet-sand. It should feel smooth as glass. Spend a good 5 minutes per light here. The better your sanding, the easier the polishing will be.
Dry and Inspect
Dry the light completely. If you see any shiny patches or deep scratches, go back a step. It should look like a smooth, frosted window.
Compounding
Chuck some cutting compound on a microfibre applicator or a machine polisher if you've got one. Work it in small circles with decent pressure. This is where the magic happens and the clarity returns.
Polishing
Switch to your fine polish and a fresh towel. This removes the hazing from the compound and brings up that deep, crystal-clear shine.
Alcohol Wipe
Use your IPA wipe to remove all the oils from the polish. If the surface isn't 'squeaky' clean, your sealant won't stick.
Sealing
Apply your UV sealant or ceramic coating. Follow the bottle's instructions to the letter. This is what protects your hard work from the Aussie sun.
A Few Pro Tips From the Trenches
Watch Out
Looking After Your Fresh Lights
Common Questions I Get Asked
Can't I just use toothpaste?
How long will this last?
Is it worth buying a cheap kit from the shops?
What if the fogginess is on the inside?
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