Making headlights look like new

I stumbled across this DIY

http://www.youtube.com/user/abes4u2

That is so easy to understand and now that I've seen someone actually use sandpaper on a plastic lens, I feel less afraid to do it to my lens when it's time for cleaning. Thanks for the video.

Now I need one for how to get the fingernail scratches in the paint out from under the door handles

-Randy