Most on-line shops stock it now or try a search engine for Alclad II. They do chrome, polished alloy, copper, brass, and many other metals plus now the reds greens, yellows, blues etc. No thinning and in a very fine suspension.
Suggest you look up their site on Google ALCLAD II
Sorry I can't give you a link
Martin
http://www.freewebs.com/martsmodels/