Thanks for the reply

It's a dual action Anthem Badger 155. I don't know the pressure, I haven't changed it. I think the guy at Hobby Town said it was set on the highest setting, which he said is good for most people.
As for mixing paint goes, I don't know how to judge whether it's thin enough or not. The back of the airbrush thinner can says 3 parts paint, and 2 parts thinner, but I haven't used any measuring cups or anything. Speaking of thinner. Is it a bad thing to stick thinner in a plastic jar? I put it in there and now my plastic jar has all kinds of tiny cracks. No idea why.
I did have some luck so far, though. Before I painted the stripes, I painted the entire body black metallic. It turned out beautifully. Things just went downhill when I got to the masking part.
Also, just now I took off my masking and found that it wasn't QUITE as bad as I had expected. Around the curves there is quite a bit of bleeding, but along straight lines and such it turned out really nicely.
I appretiate your help MoNoXiDe. Thanks! I'll look for some of that paper. I think that will solve more than half of my problems.