Yes you can shave brown wax blanks, standard kind on a Dictaphone or Ediphone shaver. I suggest a mid speed, as too high a speed can shatter the blank. See a shaver in action in a video I produced. This video shows the production of brown wax and includes rough and smooth shaving a blank, so there is about 3 minutes shaving the blank from a rough casting on one shaver, and finishing it on a later Edison shaver.
. These are entertainment blanks manufactured, this is an older method, and not the improved new method I used. Shaving is about 8min 47seconds into the video. Still, has anyone shaved a cylinder with the box kind of shaver this thread mentions, and how does it do? I suspect this might be the quick and easy way of shaving a Gold MOulded record to record on. You can get a clear recording on the surface, however I don't believe it is good to shave those cylinders due to the extra ingredients making them hard on the shaving knife of a machine, or electric shaving machine, so perhaps the box shaver is a good alternative to shaving Gold Moulded without so much fear of wearing out a costly sapphire.
https://www.youtube.com/watch?v=6B5U3GUNBjw Only shave dictation and brown wax on these kinds, not Gold moulded (on the electric shaver.)