I have all of these paints in stock with the exception of that Alsa paint Hobie mentioned, and had varying degrees of success and failures with all of them. A lot depends on the weather conditions too. I have discovered staying under 50% humidity is a must. And the lower, the better.
Having said that, I am able to use Rusto 2X and automotive primers with every kind of paint regardless. Both available at Walmart. I even use it with the automotive colors which I prefer above all. Granted, there's more work involved using auto paints with having to mix the hardener and reducer into the paint, but the end results are fantastic. Since I have to airbrush this on, and I prefer not to clear coat, I go with the acrylic enamels. NAPA will mix these colors for you and there is a tremendous variety of colors to choose from. For most applications, I'll have them mix me a 1/4 pint (1/2 cup) at a time. It's amazing the amount of coverage you can get with so little paint. Rattle cans waste more than they use.
I have 1oz & 2oz jars for airbrushing and the recipe for 1oz is, 4-tsp paint, 2-tsp reducer, 1/2 tsp hardener. This little bit of paint can cover 2 small LPR rockets on the average depending on how thick you spray it on. But you can get maximum coverage with way less paint than rattle cans.
The bottom line here is, I've gotten better results with the gray auto primers followed by a coat of flat white as a base coat. The gray primer works better for me than the white, so a flat white base coat of paint is necessary for keeping your colors true and not darkened by the primer. I still use the 2X on many occasions, especially the black. These are for quick fix painting which I still practice, but when I can, I'll go with the auto colors for the best results. Do the math, and you'll find that the cost is nearly the same in the long run. One more side note on this, so far, the metal flake colors have been most impressive. I've used copper, pewter and a metal flake magenta (of sorts) already, and have some silver mixed for a job coming up. We all have heard the nightmare stories using rattle can silvers in that you can't clear coat them without turning them gray and most of them flake and don't work well with masking tapes. I'm expecting grand results with the acrylic enamel silver. OH, and FWIW, Krylon clear coat on white Krylon caused the worst painting disaster I've ever experienced. Wrinkles from hell!