I found that getting the bevels flat first on a file using Charlies method is great, and step one. When the bevels are uniform (based on removal of all the Sharpie ink) then I go to a coarse diamond, fine diamond, hard Arkansas, and finish on a leather or cardboard strop. Always going back to front with the head flat on the file or stones. Once the bevels are flat, you can re-sharpen with the diamond stones and Arkansas and strop. The key is progressive VERY LIGHT strokes as the blades become more and more sharp as you move to finer stones. When finished, hair pops off with just a light touch.