Is it safe????? to....
 

Is it safe to use acetone on the headlight? Or will it cause them to get foggy and do u think it'll remove some silicone from the lens?

i wouldnt...i dunno what it'll do, but i'd just try to get it off...once it dries you can just scrub it off...it'll take some time but its safer then usin chemicals..my opinion anyways

Doesn't Acetone melt or soften plastic when in contact to long?

^i think so

Acetone is a solvent.

I sure as hell wouldnt use it on headlights to clean them... lol Unless you want frosted lights?

definately not. it will fog the plastic, big time.