My beautiful baby LTZ needs some headlight restoration. With its great reviews, I would normally use the 3M kit and get 'er dun. My lamps, however, are only starting to cloud in the upper corner, the plastic in front of the bulb is still very clear.

Watching the how to videos for the 3M and others require the entire headlight to be sanded and polished. Does anyone have experience with a kit for catching the problem early? Will the 3M system be ok to use on a lamp that is already 80% clear?