Burnishing machine. By TheDacchio. 15:25 video:
https://www.youtube.com/watch?v=W_H0qk8CFrM
Previously:
https://www.homemadetools.net/forum/...642#post167017
https://www.homemadetools.net/forum/...200#post165397
https://www.homemadetools.net/forum/...217#post165440