[DrBailey]

I have a heated bake spray booth. we usually heat a freshly painted car at about 190 degrees for a recommended amount of time. Different paints call for different heats. It is awesome'
My concern with what you are wanting to do is explosion , if its not vented , the fumes from the paint and heat could get bad and be bad. Is there open heat coils? that scares me , I would recommend that you speak with a spray booth company Or anybody thats qualified to analyze the equipment. Closed up like it would be , thats a bomb. Please be safe.