After sanding the badges, I laid down some coats of primer--a few thin coats and a few heavy coats. I baked them in the oven then let them cure overnight. I sanded them down the next day then I painted them the gunmetal gray--again, I did a few thin coats and a few heavy. Then I hand painted the red 'H', and I let that sit for thirty minutes before laying down a few light layers of clear, followed by a few heavier coats. Then I baked them in the oven then let them cure for a few days.
I wrapped some aluminum backing in carbon fiber vinyl then glued the pieces to the back. I left them overnight to dry with some weights on the back of the emblems, so that they were seated well against the recess. It would be tempting to apply them to the car now, but the road debris will quickly destroy them, so I will be using resin to seal them. I may or may not need to apply multiple layers of the resin, and/or sand/polish the resin. Also, I may or may not have lots of bubbles and/or destroy the badges in the process. This is my first time working with resin, so I'm crossing my fingers. Here are some pics:
