Headlight Cleaner

I've used Mothers Mag. and Alum. polish for years on my headlights - seems to do a nice job. I think some people say there is plastic-specific polish as well, but I'm not sure about that. I don't think bug and tar remover would work to get the yellow off, but the Mothers Mag. & Alum. polish will:nice:
 
I know you said replacements are out of the question, but they are pretty cheap on eBay these days. The problem with the OEM lights is, even after you spend all that time cleaning them up, they'll get all yellow like that again in a few months.