I am painting a hood for my Mustang. I want to put down multiple layers of primer to build up for blocking. What are you guys doing with your gun between coats while you are waiting for the proper flash time to take place? Also, are you saving leftover material from the cup between coats? Are you performing a full cleaning or a quick clean of your gun (splash of solvent/ shake and spray through gun until clear)? Thank you- Mitch.