for you paint guys out there, i am re-painting my cruiser myself. i am at the primer stage and things were going ok. but now i am "dry spraying" and i can't seem to fix it. i have 2 guns one is a gravity feed and one is a suction feed both are doing it. the primer starts to spray ok at first but after a couple of passes it starts comming out like sand paper. please help if you can. i am getting very frustrated at sanding everything over and over again. thanks