Well, I asked for help on this mattter, last week, and I got it. You guys came through with some fine suggestions. As a result, I spray painted some parts this afternoon. And, I wanted to do that very badly.
I bought a little compressor, made in Taiwan, for $15, that is basically built to inflate pool toys. Dinosaurs, Great Sharks, Ladies with big tits.
I also bought a basketball, a Wilson. ($5.99) at the local market, I found needles for inflating the ball. ($0.99 for three) I use the ball for my air reservoir. At least, I already had my sprayer, and some associated parts.
So, you do not necessarily have to pop for $200, to paint a model.