This is my very first post, i have been doing some reading and have found a few good instructions but still looking for something. I have access to a lot of 55 gallon drums from my work but they are oil barrels ( i work in an auto shop) i got 5 for free and 3 of the 5 have already have one side open or top already removed. Some are a little old and have started to develop surface rust, i was curious if i could use a wire brush to remove the rust then wash the piss out of it with a mix of dish soap and stout de greaser a few times then burn it 2 or 3 times. Would this be sufficient? I've never built a smoker before and im very much excited about this i love bbq. Thanks for your time and advice in advance..