Hi, I'm going to make a tapping block (chunk of metal with holes to help align hand taps), and I thought I'd try and learn a bit about material selection, hardness, and plating at the same time.
The goal is to make something that can get thrown around in the shop a bit without getting dinged up and also won't rust.
Right now I'm planning on making it from 4140, heat treating to RC30 or 40, and applying electroless nickel plating. Is this overkill?