The reddish 600 grit version that comes with the 1K.
What's it any good for?
Will it clean the swarf off a Shapton glass stone?
How about the Norton 4K/8K?
Will it smooth out a coticule without damaging the garnets like a diamond hone?
It's seems obvious that you wouldn't use it for slurry if the 600 grit particles break off and would get mixed in so I'm just trying to figure out where it goes in the honing routine.