After drilling all the holes for the original side engine bay full aluminum panels, FFR changed the panels to half panels presumably for better engine bay ventilation. Now that I have these panels, I would like to patch the holes in the frame that are no longer covered by the panel. After chamfering the hole, I tried black GE Silicone II. It works ok, but not great and I question the durability. I suppose I could fill with Bondo and then recoat with Rustoleum brush on or Rustoleum Epoxy Appliance Spray. That seems like a leap of faith. Has anyone had good results in this process? What did you use?