To that end, here's a walk through of my first Costume Chemicals video.
I usually buy mine from http://www.mbfg.co.uk/and they seem to be pretty consistent.
It's this product exactly:
If you pick any up, tell them ArmouredBrownies sent you ... they won't know what you're talking about but it'll sure make me smile.
If you have any questions or feedback on the subject just ask, I can happily answer a lot of questions about this stuff.