I sharpen knives and open razors. I normally sharpen knives manually with water or oil stones, both natural and synthetic. I pick stones individually for each knife. Cutting edge angle is given ultimately even on all the length.
For knives with complex geometry I take different approach using special equipment. I use common methods and my own know-how.
I can do sharpening on a machine with water quenching. It’s normally used for inexpensive knives with simplest geometry. Shaping-up is middle, you can’t get more with any other machine, it’s only for “MANUAL SHARPENING”. The cost for sharpening using this method is much lower than the ones mentioned above.