[electro]

... you'll notice how many cars are on the road with dull headlights, and you'll want to stop everyone and tell them how easy it is to restore them.

Haha! So that was you on the side of the road? :yikes:
Be sure to follow the directions of those products carefully.
Oh, I have seen a do-it-yourself headlight polishing attempt using acetone.
All I can say is Never Never Never use acetone on plastic headlights. Bad thing.