i dont think im gonna do it its just too hard. The only way i can think of is to overspray the top part and let it run down through the inside. But i wont be able to tell if its fully covered tho. I wonder if the header fits in my oven..hmmm all i did to the outside was heat it up really hot with a heat gun then let it cool then heat it up again then cool i repeated this like 4-5 times.