While it is still done on some specialized high-output CNC controlled machines, it is almost a lost art in the world of manufacturing. I work in a machine shop and only a few folks knew what it was. Only a couple had even seen it done. Evidently it is done primarily by either production shops or folks making ornamentals. If you have high-speed, check out some of the videos on you-tube. If I had the time it, along with blacksmithing, is something I would love to know how to do.