My Kanayama has turned partially black.
I guess it's because I hone so much.. Also I used to apply a bit too much pressure on the top turn. Microscope images showed I was bending the edge on one side ( slightly,never effected the shave)
The other day I tried the damp microfiber technique.
It cleaned parts but I stopped because it's too delicate for hard rubbing...
I've ordered the leatherique cleaner...I'll post pics next week showing the before and after....