Chrome Oxide Honing Compound
The Honing compound is made by hand from Chrome oxide and beeswax. Chrome oxide is the most common oxide for sharpening as it buffs to a fine polish but still cuts fairly quickly. You can apply it to almost any honing surface from Leather to MDF to even cardstock paper.
You can see how it is made here: https://www.youtube.com/watch?v=tEkpZbx1Kw4&t=2s
You can see how it is made here: https://www.youtube.com/watch?v=tEkpZbx1Kw4&t=2s