I have had real good luck with Caswell's MetalX stripper:
http://www.caswellplating.com/kits/metalx.html
They say that it needs to be heated and agitated to work, but I simply dunked the parts for a few days and it worked just fine. I guess it would work quicker if you heat it, but it's way easier to just leave the part in it for a while. It left some black residue that could be brushed off easily and some parts with thicker plating had to be dunked twice, but it was a very painless (and odorless) procedure. Best of all, it didn't etch the metal.