I'm a senior citizen spraying my car for the first time. Really was forced into it by a shop who took the money and did nothing for 2 1/2 years. (They did weld in one rocker panel and since it was too tall took a hammer and dented the center to make it fit) I don't understand about letting the car parts hang for 3 days due to the clear coat being soft. I just sprayed my fenders and need to move them so I can spray doors/hood/trunk lid. (will move them to spare bedroom till all parts are painted.) I will say the U clear coat is really nice. Also have a run and nibs will this sand out and buff? (1000grit-1200-1500 through 3000grit them buff)