I’ve found that Novus plastic polish works very well for the sorts of things that readers wondered if the previously reviewed 3M Headlight Polishing Kit worked on. I use it when cleaning and removing scratches from pinball machine parts and have had a lot of success polishing things ranging from cell phone displays to sunglasses.
There are three different compounds: #3 for dealing with big scratches, #2 for normal/light scratches, and #1 for a basic clean. #2 does the job for just about everything I’ve used it on. Available in 2-oz, 8-oz and half-gallon bottles. I’ve had 8-oz bottles of #1 and #2 that have lasted me several years of occasional use. I’d expect the half-gallon to last practically forever. Wonderful stuff.