The only thing I do different on acrylics is I don't put a finish on it. I almost always glue the tubes in with epoxy, rarely CA or Sumo. I turn it at high speed just like wood and when I get it close to the final size, I sand with Norton 3X to 400 grit, just like wood. Then I switch to MM and go through all the grits. After that I buff with white diamond.