I inherited a few dark gray sharpening stones from my uncle (finish carpenter) and grandpa (black smith) and I'm ignorant how to tell if they are... oil stones or wet stones (water).
These are probably the hardware store or Norton abrasives.
So..
Use oil or water or does it matter?
Or is it... use oil for industrial stuff and use water for kitchen & food prep stuff?
And dont intermix water or oil use?
If it is impregnated with oil then that is what you use, if it is dry then use soapy water.
Wash the blade after sharpening...and no, do not mix
