OK I get it, no worries. i have painted a pretty big military scheme with an airbrush, it actually added to the scale quality, IMHO.
The clear however will be a problem. The "CPA" clears in my experience must be avoided. They yellow.
The airbrush....well I cant see it laying down enough volume to do the clear.
There are some new 2 part paints in cans that I think give better results. You pop some little canister and then have so many hours to use the paint. I have heard good things about this stuff:
http://www.spraymax.de/index.php?id=329&L=1