Hello, Elisabeth,Glad to have you join us! 
There's a polymer supplier in England if that will save you some postage? http://www.polymerclaypit.co.uk/ Sue Heaser is just lovely and she carries quite a nice selection.
I use several things for faux dichro on black polymer clay: micro-fine glitters, mica powders, colored foils, leafing foils and mokume gane bits.
I've never tried china painting - that would be such a cool hobby!
Welcome aboard - hope you find some interesting things, here. 
Elizabeth
Web Mistress & Discussion Board Host, PCE