After 40 years and quite a bit of use my old centre punch is now blunt. A couple of new ones is only about $35- [ one big + one small] but I'm cheap. Can I sharpen my old one without loosing the hardness that makes a punch leave that nice little cup to get a drill bit started with minimum wandering?
Still no bench grinder tho but my mate works at a school with a full workshop and I thought I might be able to ask a favour