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If you know the thickness of the razor spine and the width of the blade you can figure the angle your bevel is sharpening if it is laid flat. Rise over run like the pitch of a house.
If you are...

I have use every shaving angle there is even slicing flesh. I can't speak for the best angle. I guess the one that doesn't cut you. :rofl2:

bouschie is correct in my opinion. Whether you use one piece of tape to hide hone wear or no tape . Keep the razor flat and you will straighten out that guys cutting edge, and form a more uniform...