Yesterday, with the weather going down to high 70's, I did the headlight restoration again after 5 years or so. Last time I did the same 3M kit but I wasn't really through with the procedure and never applied additional care afterwards. After about three years it yellowed again, not as extreme as it had been but it was definitely coming back.
It was about the time that one of my HIDs quit working, so I thought I would replace the HIDs and re-do the restoration at once. First I removed the wiring harness+relay that I made for HIDs - it became a mess after adding fog lights. Due to this I no longer have working fog lights, but I will make the wiring again for the fog lights, cleaner and simpler this time. It turned out that the left ballast had died and was blowing fuses.
After installing new HID kits, I started the restoration work.
Here it is mid-restoration. Made a slight mistake and the drill went too far down to the paint -- but it's ok.
After all work + waxing.
The left assembly was less yellowed to begin with - and it gave me better results.
I ordered the 4500k bulbs which were the same as the ones I had. But these seem to have a very slight tint of blue unlike the ones I had previously. I would've ordered 4300k if I knew this would be the case.
Yeah waxing won't last very long the sealant/clear that's used is key to how well the restore holds up. I need to replace my leaking headlights so experimented with plastic Polish, wax, liquid glass, colliate 845 after getting rid of the yellow none made any real difference over doing nothing to them.
50/50 mix of Minwax HELMSMAN GLOSS SPAR URETHANE - and odorless MINERAL SPIRITS -
I use a cotton gun-cleaning patch to apply it -
but a piece of blue paper shop towel works well -
No, you just need to learn to apply light coats. Just give it 1 or 2 light coats (not too close). When you think it needs one more, STOP and let it set up for 5 minutes, THEN give it another coat. A little practice is all it takes.
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