Hey guys.. I have never posted in this site, but its already been a huge help just reading old posts on conversions. I have a 1950 international harvester fridge that i saved from the scrap metal heap and going to turn into my 1st ever smoker. I got it stripped apart this weekend. I decided to replace the old insulation because its well 64 years old and want to put in mineral board per what i have learned on her. I am currently taking out the old silicone sealant because im not sure how safe it is when exposed to heat and its old. so i ordered some rutlan 600 to replace that today. my question that i currently have for you is about the piece of sheet metal to cover the insulation on the inside of my fridge door. I read that i should avoid galvanized. any other types that i should avoid? What do you all recommend for thickness. 16 gauge. thicker or thinner? i'm sure i will have some more questions in the coming days. I do have pictures i can post if anybody is interested. thanks! I am more then excited to enter the world of smoking!!!