It should sharpen off leaving a fairly clean edge/border at the bevel, but sometimes Duracoat doesn’t cooperate and chips or flakes. I think with a fine abrasive like a stone it should be okay. I keep meaning to do some experimenting with finishing knives and “sharpening off” the coloring right on the bevel, as if I’m not busy enough!
I have a lot of experience with different coatings for gun refinishing and honestly, I don’t like Duracoat at all. It’s a glorified paint and as such it has a lot of downsides, not the least of which is the thickness when applied compared to competing products. It’s a bit more work to heat cure it, but Cerakote is exceptionally tough and really puts Duracoat to shame in my opinion. Just my two cents though, a properly prepped and applied Duracoat can look great as we see here 🙂