Cars that were not block sanded after bodywork before paint...

Went and looked at a 72 factory yellow demon the other day three speed 340 car must have been kind of rare seems that someone had done some auto body work on it and painted it but the car was waving at you when you look down it....it had so many discrepancies in the body work that could have been fixed by just block sanding..your thoughts..is there more probably hiding underneath