I am just now trying to do some test sprays before I do my actual cabinets. I have the gravity fed guy from fuji with the 3m pps 2.0. I can't get material to come out of my gun. If i apply pressure to the cup it seems to spray, if left alone nothing comes out. Anyone know how to correct this? What am i doing wrong. This is a water based lacquer. I am extremely new to spraying. Any help appreciated.