I recently got a few corny kegs off Craigslist. To my eyes, they look like they've had a lot of miles (gallons?) put on them. I've gotten the impulse to try and shine them up a bit.
I hit a patch on one of them with my RO sander tonight, starting with 60 grit, followed by 100 and 220. I then moved to sanding by hand with 320, and finally a bit of wet sanding with 400. It's very shiny, my reflection is clear enough to make out facial features, but it's really just a rough whack at the job. Lots of swirls and other imperfections that I missed.
I realized that I need to be able to rotate the keg in place without rolling it on a surface to be able to sand this thing evenly and methodically and achieve the finish I am looking for. I'm looking for suggestions on how I might be able to arrange this without incurring a $100 trip to the hardware store. It seems like someone's got to have done something like this before.
First thing that pops into my head: Build a small U-shaped stand out of about $20 worth of 2x4's and wood screws. Two vertical lengths, spaced ~27 inches, extend up and have concentric holes drilled through them to hold an axle. As for clamping the keg concentrically at each end, that's a tougher problem.