I am getting more serious with airbrushing, and besides a new airbrush, I need to find a better source of compressed air than the cans of Propel. 

I seem to recall someone on this board mentioning a $50 air storage tank from Wal-mart, used with, I think, a moisture trap and a pressure regulator.  We have a local convenience store that graciously provides free compressed air, for auto tires, but it would sure be great to be able to use this resounce to power my airbrush.

Thanks...