Bob, I have an observation here, the rear bumper needs to be removed from the car, and the parking sensors taken out of the bumper.
Failure to do this prior to painting will result in the new paint peeling around the sensors, and it will be impossible to clean and correctly key the lower trailing edge of the rear quarter where the bumper joint is, which will result in the same problem.
It would be a shame at this stage to "spoil the ship for a ha'porth or tar", and to remove the bumper and sensors will require no more than an extra hour of labour.
I would be tempted to call them before they start applying the base coat over the primer
Brian
