I've keep reading all these posts and it has me going nuts to start a build. I checked with a local scrap metal dealer and get recycled air compressor tanks for around $60. They are aboht 48" tall with a diameter around 24". I have purchased a new plasma cutter/tig/stick welder and a new mig welder mainly for smoker builds. Before I buy any used compressor tanks I would like some feedback from anyone that has used them. What to look for, what to avoid, are they functional etc.. Also, will the finish need to be removed? Curious if the paint can withstand lower CC temps, I know they wont handle fire box temps. Any help and suggestions will be greatly appreciated!!