Cost of a single-color paint job?

You just need good gun control with a metallic. If you heel or toe the gun you will get stripes.

Inconsistent speed and distance will cause more problems.

That's why a metallic isn't recommended for beginners.

Well, I'm not EXACTLY a beginner..I've shot two complete aircraft (single-engine) and a lot of touch-up, but usually acrylic enamel (Centari, etc) and usually solids.
I'm at a point where I have to start making some decisions based on the color. The car was originally Gunmetal so I thought I would stick with it.