Got a 59 gallon, 200 litter oak barrel I want to make into a smoker. I have got oh so tired of saying.. " I wish i had more jerky" So i think this massive barrel will solve my problem. I have seen several build but had some questions if anyone had ideas... Can i stain and varnish the exterior? Will it leach in and contaminate food? And will I have to worry about adding insulation under the heating element and a sheet of i was thinking copper to look nice and to avoid burning the oak and insulation under that. Can i drill half inch holes to vent or do i need horizontal slits at the bottom?