Thanks for responces Chris ,matt, and joseth, I had not known about rustoleum 2000, i am looking on ebay after this ,Thanks PS i am hopeing too get it smokeing before summer ends,my layers next too the burn tube seeve are aranged a little differnt due too undersized houseing,if it stays cool too the touch and my cooling rail temps dont begin too rise from the norm,then we know what happen,and the other variables in range, I will have barely two layers sheet metal inside the lower drumb, and then three layer out side the lower drumb houseing. I may have to go back with the high temp insulate between outer housing later.Unless i remake the lower houseing.I think if the outer burn tube sleeve holds up the outer burn tube houseing should hold up, My next burn tube houseing will be streched water heater metal, or barrow, square aint as easy as it seem’ed at first glance. THANKS