Here is the air tank I was considering:
http://www.harborfreight.com/7-gallon-aluminum-air-tank-94801.html
Do you think that would be big enough (hold enough compressed air to do a decent amount of airbrushing)?
What would you consider quality, Mats (I've done some research online, but really haven't done any shopping)? From the online research, I've figured that I can get an airbrush compressor (not sure if it's a quality one or not) for between $150-$200 US, so, if I build an air tank, I'd like to do it for less than $125 US (otherwise I might as well just buy a compressor). I would use my pancake compressor for any other uses, so, if I get a compressor, it'd be specifically for airbrushing.