Yah . . . I used to think ceramic as in CERAMIC was hard . . . right . . . then these guys taught me some stuff. One of those things they finally hammered through my slow moving mind is :
Vanadium carbides are harder than ceramic sharpening stones.
You may be pushing around (burnishing) the matrix of metal that contains the vanadium carbides and getting an edge that whittles but it tends to be temporary and frail in my first hand experience.
Get diamond stones, you can even get them up to 8,000 grit, and don't look back.
Makes a difference.