black bumper CLEANER

[Matthew Caprio <cap29100@flash.net>]

Anyone know of a GOOD cleaner for turning those GREY bumpers, trims, and
mirrors BLACK again.  Not temporarily black since it's still oily-wet for a
week, but something that really gets all the oxidation out of there.  I
know there is something our there that someone once recommended, but I
don't remember what it was/is....

I hope it's not some zymol stuff for $139 per quart or something.

THANKS,
Matt Caprio
88 5ksq, white with grey bumpers.