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Use your kitchen countertop instead of the power sander. It will give a flatter end result.

A sharp edge on a hone can cause microchips in the razors edge so just slightly round them off.

If you have a webcam then we could have a video honing session if you wish.

Sometimes the edge is warped and sometimes it is the spine or both. The solution is the same as I mentioned.

I hope I answered your question.:)

I am unfamiliar with the Shapton 12K so I would suggest that you contact someone who uses them. Perhaps MParker?
If you are still up a creek then contact me.

Be sure to lap the hone flat first. Then if the razor is still only showing wear at the ends then you can conclude that you have a warped blade. It should take no more than 1 1/2 hours to hone a...

A new Dovo stainless is not going to get sharp with that little honing. remember that the factory bevel is "off" and needs to be reformed. Tape the spine with electrical tape, lap your hone flat,...