James,
Are planning to paint your car an authentic color or just a color you like? If you want to have an authentic color, PPG Concept and DuPont ChromaPriemer are two products that very closely match the colors Ford used on their vehicles. Both these products closely mimic the lacquer Ford used on model A's. They are single stage paint, not base coat clear coat, like modern cars have. As you probably know, base coat, clear coat gives a wet look, not the finish that model A's originally had which was not as shinny. I use a good epoxy primer on sandblasted sheetmetal and it provide a good base/sealer for the finish coat.
Rusty Nelson