I don't know if you would get the best adhesion to a graphite epoxy layer. Primer is typically in part meant to stick well to a structural substrate and also provide good adhesion for the finish layer. So... The techies at the finish company will probably recommend their primer over the epoxy graphite seal (calling that the structural substrate), and then their paint on their primer. And I can understand why. S3 told me years ago that their lpu should be fine directly on their epoxy, without a primer. 'Their epoxy.. Their paint'. So...
I suggest that results will endure better with primer, then paint, where you are going to paint over the graphite. But it will add weight. And it will only endure as good as the paint system, of course.
Almost done! Congratulations! Be sure to post some pictures as you finish up and launch.
