Mine was built at Hamtramac so according to your info should be dark gray primer first then covered with red primer then body color overspray, correct?
I purchased my car from a guy that started the project but did not finish. He had the body soda blasted then did lower rear quarters and used new fenders. The bottom looks like it was cleaned but not stripped. Then it and the door jambs were reprinted Top Babanna. I will check out the bottom on my lift to see what all needs repair. I think the bottom was not blasted so can maybe get some detail info from it. The engine bay and front of the unibody was blasted and painted nicely. Problem is I am changing color. Firewall forward underneath was taken apart blasted and reprinted. Everything behind was not refinished so will be a suprise. Before purchasing I did spend about 30" underneath the car looking for damage or rust and found very little.
John