Maguires sells a headlight polishing kit that comes with two different abrasive discs (progressive) and two bottles of liquid, one for cleaning/maintaining and one for polishing along with a wool pad to attach to a drill.

http://www.meguiars.com/en/automotive/products/g1900-headlight-restoration-kit/

I used this on all of my lenses!

I picked up an NOS (RED) side marker that was less than perfect and this made it sparkle!