You do know they make a normal Tamiya paint in a 32 or 10 ml bottle?? Here's a link http://www.gundamshop.com/Merchant2/...ry_Code=TCOLOR
Also we don't know what type of airbrush you have but there's two options I think. Propellant in a can, or you can go the expensive way with buying a mini compressor and a gauge and all this moisture crap and other stuff needed.