Good morning everyone, i am a new member as of this morning. I am going to be building myself a smoker for at home to smoke sausage and do large batches of jerky. I plan on building a 36" x 48" x 72" high I am going to use 1 x 1 x .100w and make a steel frame and then sheet with plywood and insulate. My question for you guys is do i need to cover the inside with anything or can i just leave the wood exposed? If i need to cover can i use carbon steel or do I need to go with aluminum or stainless? Any help would be appreciated.