I've seen ads on TV for a product that polishes lots of things (Flitz or something) and they show the quick rejuvenation of a plastic or polycarbonate headlamp. I have also seen a Mother's Polish product used on clear plastic during an ESPN2 hot rod show.

As I have an early '90's Subaru wagon with headlamps that have been dulled by 130K miles of winters and summers, is it worth trying to polish them up or should I do the replacement instead? I should note that the lamps don't show any yellowing and I think the bulbs are still at full strength.

I appreciate any input-