Quote:
Originally Posted by klarzy
Clean them well with panel wipe and coat with gloss clear coat.
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I agree, except..
I recently carried out some experiments with a donated lens. I abraded it down to what I thought was the polycarbonate, sprayed it with the gloss clear coat and it went misty. My assumption was it had reacted with the original coating. Not knowing how thick the lens material might be, I had been too wary of abrading it.
My MKII when I have refaced them and this lens when I had refaced it, both had visible marks in the lenses, which I had attributed to marks on the inner surfaces - I was wrong, I think the marks were the remnants of the old coating.
I tried again on the same lens, a bit more enthusiastic, with 100 grit paper, then finished with finer and finer grits, finally polishing with Autosol. I sprayed it again, this time it ended up perfectly clear, but showed signs of what looked like cracks in the coating. I'm thinking now, that might be due to doing the spraying with the lens too warm in the sun?
I have left it out in the weather since then, deliberately to catch the sun, but there has been no deterioration at all. I'm reasonably happy to now tackle my MKII's headlight with the same process.