[Espeefan]

I've had really good luck with a product called Super Clean. It's in a purple bottle, and it also takes anodizing off of aluminum parts. For chrome plated plastic parts, you just soak them for a few mins and they come out bare. A little scrubbing is necessary, if you didn't leave in long enough, or for nooks and crannies. It doesn't ruin or eat away the plastic either.

For anodized aluminum parts, it takes a bit longer. About 10 or 15 mins, depending. I bought some Super Clean in the past at Auto Zone. I'm sure they still have it.