Originally Posted by
Euclid440
So, if you are not getting a shaving edge from a Naniwa 12k, then something else is going on with your technique.
To trouble shoot your technique, eliminate all the variables or as many as you can. A Natural stone of unknow grit, used with or without slurry is a huge variable.
A Naniwa progression is a bullet proof progression and a Naniwa 12k is a proven shaving edge, it is pretty much the current Gold Standard.
Set yourself up for success with a proven finisher. Once you master a synthetic technique, then introduce naturals finishers. You will quickly know if any issues are the stone or technique.
Look straight down on the edge, any reflection on the edge are where the bevels are not meeting. Depending on what you see, re-set the edge on the 5 or 8k and finish on the 12k.