I use fine SIC sand paper to make small radius on my new ceramic glass ...........I have used glass from USA Knifemaker. Finally noticed a bit of dishing/wear after three or four years, and I had a few chips on the edge of the glass as well. Put a torch to it, melted the epoxy, and took off the glass. Cleaned it up, flipped it over, and now I'm using the other side. Seems too cheap and simple for carbide to be worth it, IMO.