I have been satisfied with using green wheels to chew away carbide and steel. They kind of work, and keep the steel away from the diamonds. Then, you can use an inexpensive diamond wheel on a rotary tool to just give the edge a touch. Or those diamond hones or sticks also work. The main thing is to keep the steel part of the brazed tools off the higher speed diamond wheels. It seems to work for me. When the edge is in the right shape from the green wheel, a few rubs on the stick really helps the edge cut a lot smoother.