Once the filler work is finished we mask the car and clean the surface for primer. We usually use an epoxy primer, allow it to flash the recommended amount of time them apply our filler primer on top while the epoxy is still within the recoat window of time so that sanding is not needed between primers.
After the exteriors and jambs are primed the exterior is guide coated then the jambs were masked and painted. At this time we also painted the door jambs, engine compartment and under the lids so that the car could be reassembled and returned to the mechanic to have the engine and transmission installed.
We reinstalled all the wiring and hardware in the engine compartment before it left.