Methylene Chloride is what you want. It's found in a lot of paint strippers. I used Zip Strip to remove the powder coating off a set of wheels. Just coat it with the zip strip, wait 15 minutes, hit it with a fine brass brush on a grinder or drill and it comes right off. Neutralizes with water, will burn the hell out of your skin. Do NOT get it on you, and don't let it dry.