Headlight lense polishing

There is a product called "Blue Magic Headlight Lens Restorer" that is inexpensive (I think I paid $12 for an 8 ounce bottle that constitutes a lifetime supply for someone who just has one or two pairs of lenses to polish. If your lenses are really bad, you take some 2000 grit sandpaper to clear away the worst of it, then polish with the goo in the bottle. Works like a charm, but needs a quick repolish every 6 to 8 months. It takes me about 20 minutes to do both headlights on our 2001 Jetta when they get bad, about 10 minutes if I keep up with the chore.

I've tried those kits. They run around $20 for a single use, last no longer than the Blue Magic, take longer, and are more of a pain in the butt than I am willing to put up with.