[rosenkranswa]

Not sure about the Model A, but Model T bodies were painted with a low pressure spray, really a low pressure drizzler, that looked like a small rake. The paint dripped off and was collected for reuse. Parts that were added to the bodies later, like fenders, were dipped. Passenger car bodies were rubbed out for a glossy finish, trucks were not except by special order.

I would guess at least in the early years, Model A's were painted similarly. Layers of semisolid paint would build up in the paint spray areas and need to be cleaned off periodically. These would eventually harden up and could be shaped and polished into very interesting shapes called Fordite.