I do use a Coticule slurry stone. I need to cut off a piece of my C12K for slurry. I even tried building the slurry with Windex but it did not seem to make much difference over water slurry. But straight Windex is a feel all its' own.
i did try .5 diamond spray on the C12k and it creates a substantial burr that I remove on soft wood. but I prefer to avoid the wire edge altogether.
I specified the naturals. I would not recommend trying Windex on resin synthetics.