Diving boards VS plastic bumpers aging differently?

[Kershaw]

a LOT of hours spent polishing.

[88BlackS-ETA]

How did you get your aluminum bumper to shine like that?

Probably something along these lines like I did. Polished all my trim and my bumpers.

http://www.r3vlimited.com/board/showpost.php?p=4494996&postcount=1

[helalo]

i replaced my 88 chrome bumpers to plastic bumpers and threw the chrome ones in the garbage

[88BlackS-ETA]

i replaced my 88 chrome bumpers to plastic bumpers and threw the chrome ones in the garbage

[ForcedFirebird]

a LOT of hours spent polishing.

Actually didn't take long. 7" polisher with 220 grit to remove the anodizing, DA'd them to 320, then handed them off to a shop with 2' polishing wheels. Took them about an hour each to fine sand and polish. Removal of the anodizing without removing too much aluminum was the big pain.