The epoxy on bare metal is correct. Here is the order you should follow to get this done:
After epoxy on bare metal, put 2 coats of 2K primer over entire car. No sanding between coats needed.
After 2K primer dries, resand and shoot with sealer first. No sanding sealer. Shoot base coat and then clear coat. After this dries, sand it and buff it to obtain the finish you are looking for.