For the ones I " bugger up" during practice, a 12" flat bastard file works wonders at removing any dings in the blades. After that, it' s on the the sandpaper for the final honing.

As for them coming out of the tube sharp, I think that they probably could be used without any touch up, but they certainly are not shaving sharp. At least the two tubes I bought were not. The points were extremely sharp but the blades had a slightly serrated feel due to the tooling marks. After honing, the whole head is just scary sharp. The edge of the blade will easily remove hair, but to run your thumb down it' s length it is absoloutely smooth. No burs of any type.