This is what my friends husband had originally said (sounds similar to what you guys are recommending) yes I use a polishing compound called autosol. Its a aluminum polish with a fine abrasive, a foam pad on a drill or something similar. If they are really bad I wet sand them first with a 600 grit sandpaper and water, then polish" I took this to the body shop where I was having a part of the car painted and they said they didn't have the product and that the plexi was melted. Vancouver Canada is notorious for lazy people who don't seem to know much. Thanks to your posts here I think I'm going to head over to the island and see if I can get my friend's husband to have a go at it....each replacement light on ebay is almost $500 and none of them look too good
thank you much