This isn't performed on a Honda, but I thought it was good reference nonetheless. Call this a mythbusters, I've used toothpaste in the past out of curiosity, and it worked quite well for me, perhaps a bit better than below, and I've even advocated it on the forum before as a quick solution. Spotted this earlier elsewhere on the web and thought I'd share. For the record, headlight restoration kits tend to contain an abrasive polish as used below and some abrasive surface like a sanding stone, I personally use Meguiars PlastX (and 2500 grit sandpaper if needed). Why pay more for less? Full frontal shot Here's the headlight we are going to be working on. Left side will be toothpaste, right side polishing. The toothpaste used for the experiment. Getting started. 50/50 (toothpaste/"original") 50/50 (toothpaste/"original") 50/50 (toothpaste/"original") Details 50/50 (toothpaste/"original") Details 50/50 (toothpaste/"original") Details Not as clear as I like... 50/50 (toothpaste/tape line/polishing) Toothpaste side details Polishing side details Fully polished...way better. Moral of the story; it pays to do a job properly.