Years and years ago when I was working in a shop, I learnt how to use the lathe to turn drums & rotors. I always only took off the least amount to clean things up . . . course, that was when drums and rotors had lots of meat to them and you could turn them a couple times . . . couple of machines I kinda wished I had bought at swap meets - brake lathe, and distributor machine . . . . maybe an old tire machine & balancer too . . . but then again, the shop at home barely keeps the cars in them, let alone all these machine wishes . . . .