Hello, This is my first time posting, but I've been lurking around planning my build for a few months. I'm planning on making a bare-bones UDS, leaving options to add cool chimneys later on. I picked up my 55gal drum this evening from a Craigslist post for $20. The guy assured me it was unlined, but I'm not so sure. He said his business gets them with glue inside, but the glue is contained in a plastic bag, therefore there weren't any hazmats in there (and it's not lined with plastic like food grade barrels). Anyway, it looks like it's painted. It's rust colored and comes off on my finger kind of like running your finger over rust, but it's way too even to be rust. I snapped some pictures, let me know what you think. If it is painted, I'll have to hit it with a wire brush and a burn-out fire. Thanks! Ben P.S. I'll post pics of the build once it happens in a few weeks.