Coffe mug sharpening anybody?

I've done it. It works well. Beware that the mug you choose has no defects on the bottom. You want a smooth exposed and un-glazed ceramic ring on the bottom.
 
I use a mug to touch up friends' kitchen knives when I'm visiting. Personally I haven't been able to get them to a point where I can move on to stropping with any appreciable result, but it gives them a functional edge for most kitchen duties at least.
 
every 'Deli Counter' clerk sharpened his knives by holding them flat against the inside curve of a 1gal ceramic pickle jug and running the blade around the jar.'

My thrifty Grandad sharpened his safety razors this way on inside of a coffee cup.
I turned out all the more thrifty & just dont shave.

Btw, I use porcelin tubes from 'knob-n-tube' wiring.
 
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