After many years I am finally ready to prime and paint my user name sake '73 barracuda which has turned into a '70 clone. On my previous and first painting project I learned the hard way by painting the parts before assembly and some panels did not match. My plan this time is to paint the inside of the shell, jams, interior of doors and trunk lid etc. Then hang the doors, try to mask off everything, then spray exterior with high build primer, block sand, etc. then do the final paint. I would like to get the doors adjusted so I do not have to go back and make any adjustments after the windows have been installed. While adjusting the doors should I add weights to the doors? If so I can find the windows and hardware which are in the attic to weigh them; however does anybody know how much weight to add?