I was going to say that.. ive used it on my headlights before (shhh!) it worked ok, but if you dont wipe it up immediately, it leaves spotting that are really tough to get out, i got some on my gauge cluster and didnt notice, took like 15-20 minutes of buffing with plast-x to remove them
lots of shops are now getting kits in to restore headlights, they are a bit different than what you can buy from a store. the kits we got for the shop are sanding and buffing like any other, but include a final clear coat with UV resistance. according to the manufacturer it is supposed to last 4 years (but no actual warranty to my knowledge) last time i was at a pep boys i saw they were advertising that they do headlight restorations too