I got my 8 used and the exhaust tips were soot covered and tarnished from the rich factory tune. I thought they were toast and was looking for slide ons or a catback just for looks. Then I saw this at a local parts store and gave it a try. Tips look new now, only took 10 min a tip. Tear off some wadded cotton Luster Pad and rub vigorously until a black liquid covers metal then wipe with clean rag. Similar to Mothers mag and aluminum polish but works way better after trying that first.

http://www.properautocare.com/mepolupad.html#

There is some pitting from neglect but 100% better than when I got them. The bumpers dirty and car needs washing but the tips are clean now.

you should look into Custom English Polish.

http://www.rx8club.com/showthread.php?t=77235&highlight=gold+racing+beat

never heard of it before thanks^^

So many different cleaners
mass
simichrome
mothers
and lots more at the hardware store
Wonder if any one is any better than the others