sadly, you may wait some time to get paid. i hope not, but you never know.
back in my junkyard and used car lot days, we went around to the various body shops in the area mooching their leftover cans of paint.
when it came time to spray a car, we would "mix up a custom color".
we also included some kind of special graphics, like a type of firebird chicken on the hood of a camero, or some stylish stripe pattern on a B-body.
this was way before the 80's and 90's graphics appeared, and we always made sure to have a little left over for future "small touch ups".
when the car was sold, we always told the buyer it was a "custom" mix, and if there was a crash, the car would need a total re-spray.
no problem for the buyer, super cheap for us !