So one of my scouts told me the other day he can source a barrel for $15. At that price, I figure I might as well go ahead and build a UDS. Why not, right? But then he tells me that the barrels were originally used to store thinner. I don't know what kind of thinner, but it's probably some petroleum-based chemical, and is not exactly food safe. So I'm wondering if you can decontaminate a barrel that's been used to store non-food chemicals by a simple burn out and thorough scrubbing of the interior after the burn? And if that idea won't do it, is there a safe way to decontaminate old chemical storing barrels? I'm sure this question has been answered before, but I didn't find a thread addressing it directly. So my apologies if I've started a thread on a subject that has been beat to death.