If you mean to protect, any good wax should do it. I like Maguires NXT, myself. Many chrome cleaners work well. Many times the "chrome" is actually a layer of aluminum that's atomized and sprayed on the plastic part. So you can also try any cleaners used on aluminum wheels. Just don't go too heavy and it's always a good idea to try a small inconspicuous spot, just to make sure.
By the way, I like your user ID, seems familiar.
Welcome to the forums.
__________________ '05 Sonic Blue GT w/ '07 V8 engine, 5-sp, IUP, Beige leather interior, nothing else -
just the way I wanted it.  (1 of 113)
OK, so I've added a few things to it. Check my Profile - too many to list here. | 
polish/protect "chrome" metalized plastic 
