Lately I have a new method/order of priming the bonnet. We prime all of the internal flanges, mudshields, diaphragms, and the inner valances, but leave the 4 main outer panels bare until after the test assembly and gluing of the flanges, during which step we often have to make changes to the corners of the panels, etc. But the adhesive should not be applied to bare steel, so I do spray the areas where the flanges will be glued down with a coat of self-etching primer, which is about to be removed in this shot before applying the final coat of epoxy.