Depending on how much polishing you need to do, I use a dremel tool, felt pad and the dremel supplied polishing compound for heavier scratches. I finish up with Cape Cod, or just use that for lighter scratches.
I try to keep all my PCLs and bezels looking good. It's easier to keep them out of harm's way so I keep an imaginary protective bubble around my watches - nothing touches them if I'm doing things right. Sounds like a hassle I know but I've done it for 30 years since I bought my first gen and it's very second nature now.
Depending on how much polishing you need to do, I use a dremel tool, felt pad and the dremel supplied polishing compound for heavier scratches. I finish up with Cape Cod, or just use that for lighter scratches.