I have a Vaper HVLP Primer gun that came in a 3 gun set, and i have a 1977 chevy longbed that is in desperate need of paint, i just finished welding in all the holes in the body but have not done any body work yet, i need a good primer that i can spray over the entire truck to protect it until i can come up with the money to paint it for real, which could take anywhere from 6 months to 1 and a half years what is the best primer out there for this al in all under $250 to do the entire truck?????? any more info needed jsut tell me i'l ltry to help thnx