GT is correct, THIN is your friend. If you stack wet (not fully cured) coats on top of each other, it does not allow the solvents to escape (off gas). Use your thin coats to cover, check the MDS (material data sheet, "or instructions"), and pay close attention to the recoat times. Use a wet coat as your last coat, and let it fully cure before trimming. It's lots easier using real automotive paints because they "chemically cure" with activators and hardeners added to the base paint.
Paints are formulated to work best in a relatively small, sweet spot window. As guys, we never read the directions until we have a problem. If you desire the best painting results read the directions and pick the best environment to do your spray painting. Things like ambient temperature, surface temperature, humidity, dew point are very important to your results. In a production environment, these items are "controlled" in a spray booth. As "Driveway Painters" we have the ability to control our painting environment simply by picking the best time of day, or day of the week to do the painting. The key is to be aware of the environment in which you are painting.
John