I would never sharpen it. It goes back in the kitchen when I'm done with it Someone could cut themselves while eating cereal.
Seriously, when it is dull it can be used aggressively without potentially taking any wood off as well. It plows the bark off and simultaneously bones the back which I consider a good thing. It is not a scraping of the cambium that I am going for but basically like using your fingernail to remove tape.
Reduced the stave a bit more and trapped it to the back today. Ready to put the bends in over the next day or so.
More pics coming even though I sense this isn't very riveting stuff.