I have a 1995 SC and want to make my headlights loose that yellow tinge. Is if form the inside of the headlight or the outside. I did a search and 1000 1500 then 2000 sandpapering seem to do the trick, but do you do this to the insides or outsides>? Also where do I get this kind of sandpaper. Sorry for the dumb question, but I'm only 16....lol