How to? Polish / restore aluminum trim

I have a set of wheel lip moldings that are 43 years old...

They need restored, mostly just dull, oxidized, small scratches, some undercoating...

So should I go after them with 600 grit? Any chemical do's / donts? I'm not looking for perfection, just want to clean em up to look good. My car came with them originally, but they were all gone by the time I got the car so I picked up a set here in the parts section.

Thanks

Mark