Quote Originally Posted by onimaru55 View Post
Maybe so... But I have seen the opposite with slow cutting stones where the slurry floats the edge off the stone & & hones the shoulder more.
It's a bit hard to generalise.

What you are seeing may be what Alex is talking about, and the very edge may be microscopically convexed, and when put on a hard flat stone the edge is not making contact, and the back of the bevel is polished.

Or could be hydro-planning also. Hard to say, either way, the edge is not in contact with the stone.