Buy the 3M Headlight restoration kit. The one that uses the sanding pads and a drill..
I use them all the time. It will fix that issue in a hurry.
Do not forget to tape off the WHOLE AREA> get an additional roll of the painters tape. Go nuts, tape everything and leave the hood open when you use the drill. Tape 6-8 inches around and do a couple layers. Thank me later on the tape tip.