Darin, Thanks for the kind words. I haven't used the Auto Air products, but if you think you are pretty sure of your colors, I would use whatever type paint you intend to use on the final job. It will give you a chance to practice with mixing ratios, blending colors together, and gun settings. If you paint something that isn't too large, think about doing a nice job, and it can become a piece of "wall art" for the garage. :-)~