Mirror making machines are diversion all of their own, not necessarily a labor saving device for the inexperienced.
Its probably the case that until anyone learns the subtleties of producing a superb mirror by hand, that they will never make a good mirror by machine . Part of the art of making mirrors on a machine is learning to introduce randomness to mimic the natural smoothing action of handwork
. I still use an element of hand polishing in my mirrors and will always do so .