i just thought of this now. i was looking at some old model paint in the tiny jars thinking i might try painting some piece of a computer. so i tried mixing the seperated paint and it took forever and didn't full mix. thinking some more i decided i need some kind of paint mixer and then it hit me. i grabbed a little jar of paint some tape and my handy dandy saws-all (reciprocating saw) and taped the paint to a 6" blade. i shook it for about 30 seconds to 1 minute and it worked great. you should try to mix it first though so it mixes better rather then sticking to the sides.