The headlight lens on my 2001 Pontiac are getting hazed over. I guess it's the UV coating coming off. It's not smooth to the touch. The car is outside 24/7. I sanded a small spot with 1000/1500/then 2000 wet sandpaper. Next I applied scratch-x a few times. I can still see small scratches in the lens. I guess I should have started with 1500 or 2000 first. Can this be fixed by hand?(getting them clear again) I don't have a PC. Should I do the whole thing?