Normal powder coating is good only up to 300 degress, so if it's near the exhaust no good. But the symptom of that is dulling of the surface, not bubbles - does sound like surface contaminants outgassing.

Suppose it'd be best to clean and bake the piece before coating?

-Boyo


'48 Willys CJ-2A / '55.1 Chevy 3600 / '66 Austin-Healey 3000 / '04 Volvo wagon (parenthood!?)