The other day I tried out the new duplicolor kit. The polish seemed to work pretty well. It cleared up the lenses without too much hassle, and I did it by hand. The clear coat is VERY thin and the directions say to put on a medium thickness coat... Yeah, this stuff just runs like crazy. However, its so thin that you can't see the runs once it dries. I did two coats of it. The second coat didn't look amazing, but its still way better than before.
Here are the pictures:
Before shot. The passenger side is much worse than the driver's side. I'm not sure why the driver's side held up so much better.
Here is the passenger side headlight after polishing. It cleaned up very nice.
Here is the after shot.