I got your email and will follow up with you, but in this case, I would not recommend powdercoat as the brakes get too hot on our cars to do track work with powdercoat. What you are seeing there is the result of a really hot brake. More than likely, the fluid seeped from around the threads of the bleed screw and not from the hole, as when the brakes get really hot, the metal expands just enough to let fluid seep out. This is what happens when you do serious track work with powdercoated brakes on our cars without cooling ducts.
before:
after 1 hard 20 minute session:
