Now we know what happens when your hoof knife gets blunt, don´t we. Why not invest in a stone that is designed for the job?
Economy stone is medium grit, rounded on one side, flat on the other. The rounded side suits the curved blade of a hoof knife.
Quality stone is a special, fine-grit oil-stone. For most effective sharpening use with a light oil such as kerosene, WD-40, or similar. The oil..