I want to taper some of the rubber Be gave me, but I can't find a roll cutter, only found an X-Acto knife. If it's really sharp, would it work?
Nah. Washers are, for the most part, too thick, not the right metal to hold or take a sharp enough edge. Don't bother. Sorry PietIf you have access to a drill you could sharpen a big washer and turn it into a roll cutter.