Because the clutch and brake master cylinders had been leaking for a significant amount of time, there was some paint damage on the firewall and some exposed metal that was beginning to corrode. In order to prevent any further damage we decided to repaint the engine bay. The first step after disassembly was to clean everything, first with degreaser and a pressure washer, and then with laquer thinner and (lots and lots of) paper towels.
After thorough cleaning we scuffed the paint, wiped everything down with wax and grease remover, and then primed the engine bay with 2-part epoxy primer. After the primer cured over the weekend we painted the engine bay with 2 coats of single-stage enamel in the original BMC Vermillion Red (orange).