Ok, I’ve gotten the buffing out of plastic headlight assemblies down to a science, and have absolutely perfect results there. But only if water has not gotten into the headlight. Outside of cracks or damage, it appears water gets into these headlights thru bad sealing. Particularly older headlights, as they seem to use a black gasket-like material to seal the lens to the housing. Newer ones appear to be put together with a whitish-tan caulk.
Does anybody know what exactly this caulk is, and if the factory caulk can be released with a heat gun without having to melt the lens itself?