05-07-2017, 11:08 AM
The best most comprehensive treatment on sharpening media that I've seen is Ron Hock's book The Perfect Edge. I liked it because of the technical background and the why something works. As opposed to the "just use this this and this" advice. You seem to not be afraid of the why. That said diamond seems to be changing the game from stones like you have. Waterstones next then oil stones are least efficient.
I'm curious why your oil stone is dishing while flattening. The only thing I can think of is a slurry is building up in the middle while flattening and not getting cleared away fast enough. Maybe use more oil or water in the slurry. That old binder in your stone is a question mark too. Let me know what works for you. My dad had a bunch of oilstones that he used for knife sharpeing. They are too deeply dished for flattening any planes or chisels. I haven't bought a diamond flattening plate. That is my next step.
I'm curious why your oil stone is dishing while flattening. The only thing I can think of is a slurry is building up in the middle while flattening and not getting cleared away fast enough. Maybe use more oil or water in the slurry. That old binder in your stone is a question mark too. Let me know what works for you. My dad had a bunch of oilstones that he used for knife sharpeing. They are too deeply dished for flattening any planes or chisels. I haven't bought a diamond flattening plate. That is my next step.