We'll find out, but I think you'll be convinced by the ones at the edge in other pictures that they're not evacuated carbides. A couple of them are big enough to see with the naked eye if someone tips you off. I'll sharpen them out and see if there are more under.
I generally find that the washita is easier on an edge rather than harsher. Failure is more common coming off of diamonds, but the washita looks fantastically coarse because the grooves are wide.
There were several other pictures on here a couple of weeks ago before I ran out of steam.