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If you want to add a bit of "sharp" to the edge, 0.25 micron diamond is a good choice. This will introduce a bit of micro-convexity near the apex, but not convex the bevel as would 0.5 micron or...

Do you use chromium oxide after the one micron lapping paper? On what substrate?
What do you want to change about that edge?

I have experimented quite a bit with diamond and boron nitride...