I am with Davie Rase on this. For final honing, I use a black hard Arkansas surgeons stone. Sadly, those are hard to get these days as scalpels are no longer sharpened, but are disposable. Most people would be surprised to find that these scalpels are not that sharp, they are not cutting anything nearly as dense as wood, also they are very thin and flexible. I have access to them but don't really have much use for them. As an old RN, I learned to sharpen the old style scalpels, I use the same technique on chisels. I final polish with leather, nothing added to it. I use a GRS diamond wheel for my gravers though. With the holding fixture that has the degrees on it, you can perfectly repeat any angles you want. I would love to try the diamond stones as I am a tool junkie but since I feel confident with my old Arkansas stones and techniques, I will probably keep using them.