I bought paint from my local auto parts store today.  It was their own brand.  I mixed it with their thinner and sprayed my first coat on my fuse and wing.  I estimate I only used about 2 ounces.  This looks great already.  4-5 more coats and it will be awesome.   1 pint of blue and 1/2 pint yellow and the thinner totaled $31.00.  I still have to check it to make sure it is fuel proof.  If not I will get a pint of clearcoat. 
I was loking for the Rustoleum Professional when I ran across these guys.  There happened to be a guy in the parts store around 80 years old who built and flew RC.  Since he recommended their paint, and I was tired of looking, I bought it.  I am glad I did now.  Oh ya...I used the Rustoleum gloss white on the belly of my plane.  Bought it at Lowes.  Now I am glad they did not have any other colors available so I had to keep looking.  The Rustoleum went on heavy.  I may sand it off and use the auto parts paint.  If you can afford a compressor, go for it.  It goes on so much better than spray cans.