Got one of these at an auction in the fall - guy bought a bunch of stuff and didn't want to take it all, so he sold me what was left, and I got this thing. Found a similar one in a 1961 Goodyear catalog. A real AC piece, it's not in bad shape but I haven't tried to plug it in. From what the catalog says, it uses some kind of abrasive and air to clean them. Just wondered if anyone even uses these things anymore? Just good for decoration or what? I didn't pay much for it, but I don't really have room to set it up, it's in the storage unit. I have about half the stuff to set up a period gas station display. Maybe I even asked already and have forgotten, but it just ocurred to me earlier when I was looking through the catalog and saw it there.