I used spraymax, I can't comment on whether it is better or worse than other brands but it is very commonly used. Sand off the old clearoat with 400, then refine with 800 (no finer than 1000). Clean clean clean, and make sure the 400 grit grooves/pits are all smoothed off before spraying.

My experience is with plastic (I am assuming polycarbonate) lenses, not glass, which are the vast majority of headlights in the last 20 years. I dont think glass would have any clouding issues as it wouldnt get damaged by UV? Sealed beam units would be better off just replacing.

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth

I am still hung up on micro scratched windshields. I made a thread a ways back, no joy