Painting

Very informative guys, appreciate the info. I’ve been painting lacquer’s for 40 years with sanding sealers and catalyzed lacquers so these procedures are a little new. About 20 years ago I painted the race car, (all DuPont paints) base, pearl and clear. Turned out great then. This was over the epoxy primer that had been on awhile but I sanded with 320 then shot the covers. If it’s over 72 hours it can be scuffed up?