Jeff, here are a few tid-bits I have picked up over the years, small compressors that are working hard are going to give you water drops spitting out at the gun. We have had success using a large desiccant dryer in line and a mini desiccant dryer at the gun, but we're using a large compressor with 50 gallon tank. Keep an eye on the balls.........when your blue balls turn red, stop emediatly and let things cool off.......yes, we're still talking about painting! Never spray dope when it's raining......or you will trap "blush" on the surface and it will never go away. I use a cheap HVLP gun from Home Depot and throw it away after a few jobs. If the gun starts spitting, turn the air pressure down..........these guns want no more than 40 psi. Feel free to email me with any issues, may be able to sort things out.
Have fun,
JJ