My car had been re-painted 7 yrs before...and inside trunk and door jambs looked like new....(car was orig midnight green, painted red by prev. owner)but still had rust in one quarter , and one front fender had differenent red color (wreck),plus V-filler (69) and one headlight surround broken , so I made a 'total' re-paint w/o going into door jambs and trunk using same color paint....
also , I had my paint job done in two sessions...reason was that it is VERY hard here in Houston to get anyone to look at a classic car paint job, w/o quoting 6-8K , they are worried about classic car owners being "picky"...so I found out that its lots easier to get "repairs", so I did my front 1/2 = fenders , cowl, headlight surrounds etc first,(total of $1250) picked it up, drove 3,4 weeks , took it back in, repaired rear quarter, took out ding on opp side , painted doors , and rear end....(this time $1450)
making sure I bought enough paint first go around that it came from same 'batch'....so I had enough for the second job.....
Of course car is not 'perfect', but usually only I know the 3 spots of imperfections , but its to be driven , prob. will get dinged ,scratred at some time again...

the real killer was late last fall when visiting a friend , my tail panel was "keyed" , left to right above the tail lights....
But using up 2 weekends using almost all of my patience I fixed/repaired it,filled in the crevices w paint, sanded down w very fine sandpaper, polished, now almost not visible....