>>774238The choice of grit should mostly depends on how large a surface area you will be grinding.
For setting new edge bevels or fixing visible.edge damage, a 240x waterstone (ideally a Sigma Power Select II) is a great choice.
For working a primary grind, I use a 90x silicon carbide oilstone loaded with 36x silicon carbide from another stone.
Pic related primary was thinned that way.
