I've used SiC grit to flatten dished vintage stones, which I accomplish with coarse grit, 90x. I can't see the point of polishing the stones, they'll...
The Washita I used is the coarsest or softest of all the washitas I have. The other ones feel "harder". None of mine are labeled, so I don't know how...
By chance I managed to damage the edge of a smoother iron, Moulson Bros. tapered, laminated. The pictures show the grinding progress. The stones are...