Gap for the doors

What should a targeted gap be between the doors and cabin top to allow for the paint spraying. Doing the doors the standard build method (no McMaster door seals installed), with a slight 45 degree on the door edge.

Im down to the semi final fitting. Plan to install the door mechanism and the basic door seals, and then a final sanding for the proper gap.

Thanks....

Well doing some research I found out a standard coating of paint is about the thickness of a piece of printing paper.