I finally have all the creases, bends, rust and cracks repaired on the cab completed and ready for final primer and paint. The frame, suspension, steering, brakes, etc is completely gone through, renewed cleaned up and painted. I’d like to paint the cab and marry the two in place again. Then I could start putting things back together and clear some room in my shop. Windshield, steering column, wiring, seats, brake, clutch pedals, bleed the brakes, rear glass, headliner and trim, etc. My question is paint purchase. What is shelf life if I were to buy a gallon and only use part for the cab, doghouse and headlights and rest down the road? Fenders running boards black so no worries. Body will be boatswain blue, single stage probably from Jim Carter. Hood, sides, doors and bed still in progress and I’m slow… gallon or a quart? And would a quart safely do the cab?