Japanese swords often include a groove known as a bo-hi. In this video, swordsmith Walter Sorrells shows the method he uses to cut a groove in a katana, the Japanese long sword. The techniques shown here -- which are actually quite different from those used by traditional Japanese sword makers -- can also be used to cut groove in modern knives.
Making the polishing tool shown in this video: https://youtu.be/YYPAVOPHLFY
Bo-hi Scraper Video: https://www.youtube.com/watch?v=3rbzQm_D15U
More at:
Sword making videos: http://www.waltersorrellsblades.com
Tactix Armory: http://www.tactixarmory.com
Walter's Instagram: walterstactix
Tactix Armory Instagram: tactixarmory
Twitter: @WalterSorrells
Facebook: http://www.facebook.com/WalterSorrellsBlades
Patreon: http://www.patreon.com/WalterSorrells