I'm no expert, but may help a bit. If you are orange peeling base coat, you are trying to put too much on with too much pressure on the gun. Also, you may not have mixed correctly. Tell me what you are shooting and what the directions says your mix is supposed to be. Base coat is not supposed to be shiney or wet looking and you only want enough to give an even and consistent color. If it is rough looking, the spray is flashing before it hits the surface and appears as overspray much like you have to hot a reducer. Depending on temp, I will wait 15- 20 min between coats. (if I'm doing an entire car, there is no wait because it will take me more than 15 min to get all around. The label should tell you the max time between coats.