The advantages of sharpening tools with a Japanese waterstone is the ease of flattening or resurfacing of the stone. This gives the user the option of always sharpening on a flat surface, thus obtaining the very best results.
Use this 150 grit ceramic stone to regularly dress the stone. The hard ceramic particles and bond means it will never wear out in normal use. Keep one to hand and use frequently by just rubbing it with a circular motion across the top of the waterstone.