Metallic Body Paints - any advice?

Hey, all.

I've been body painting for years now, but I've never found a metallic body paint I've been completely happy with. I've got a few sets coming up which call for copper, silver and gold paints, and this means I need to lay my hands on some. Any advice for one which doesn't chip and flake off in just a couple of hours? 

Bonus points for some which I can readily lay my hands on in the Vancouver, British Columbia, area.