DaniGü2 years ago000I have an old 455 sharpening machine and the drum with the blades is relatively blunt. Is it possible to have the drum sharpenedShow in original language (German)Anonymous2 years ago • purchased this product000purchased this product Helpful answerIn principle, this should work if you have the right sanding machine. I would ask Caran d'Ache if they know any sanding partners or if they have replacement drums. Good luckShow in original language (German)CommentDaniGü2 years ago000Thank youShow in original language (German)Comment