Doing all of the above will just be an on going battle of polishing, since the parts are aluminum and will oxidize and turn dull after a short period.
You will need to have it re anodized.
I did this with the rear sections of my side trim for my burb, which nobody reproduces yet.
My stuff was nasty from years of dents, scratches, and even a portion that had a rip. These guys fixed it all for me, and when I got it back the stuff looked OEM new. The only thing they didn't do was paint the black stripe, but from their website it looks like they may be doing that now. Since when I did my business with them, they were just getting their shop started.
Check em out. I was very pleased with the price and workmanship.
http://www.kingoftrim.com/