I first touch mine several times on 2 of the flat blade edges "lightly" on an 80 grit belt sander. Rotate and touch all 3 sides....2 blades at a time, and I do this about twice or 3 times around until all the edges are even. You can color the blade edges with a black sharpie first if you need to, so you will know when you have the edges all even.
Then I use a small fine cut flat file to hone the edges from back of the blade to the front and keep rotating for about 20-30 strokes....3 strokes at first, then rotate 3 more strokes and so on. When I get down to the last final 4-5 rotations, I lighten up on the pressure barely stroking the blades at all and go down to 2 strokes, then 1 super light stroke the final couple of times around.
Then that's it, I don't do anything else to them and they are hair popping sharp.
It took me awhile to get a "Feel" for it, but when you do........you will know when to lighten up on the strokes and when to stop. I tried stropping on leather, card board, and other materials before and it didn't do anything for the sharpness and sometimes it even felt as if it dulled them slightly.....so I didn't do that anymore.
I zipped one through a coyote like he wasn't even there. So that tells me that they are plenty sharp.