Just an FYI, Novus 2 and Novus 1 work very well to get old hazy headlights looking good again. I had previously tried the sanding methods with auto parts store kits and they always left me a little underwhelmed. I thought about Novus and decided to try it. Just a little circular wiping with a paper towel with Novus 2 and then following that with Novus 1 and the results were much improved and almost like new. The yellowing and haze was almost all gone. When finished wipe with a clean paper towel or a damp paper towel to get any remaining Novus residue off. After a couple weeks it still looks great.

I wish I had taken before and after pictures to show.