How to clean a used whetstone

Question

i have a very fine grit whetstone that has got "leaded up" with metal. it no longer sharpens. how do i clean the old metal residue off of it so it can sharpen again.

Answer 1

It's going to take another stone.  Oil down each stone and rub the two together.  The coarseness of the other stone doesn't matter much, but I would definitely use a coarser one as it will grind down the embedded metal faster.  I regularly resurface some small arkansas "slips" on a diamond lap.  I know someone that has recommended resurfacing stones on a flat piece of concrete like your sidewalk.  I've used this method as well.  Not only will it clear the metal, but if your stone is uneven, it make it level & flat again.

Answer 2

Use a mid grit diamond sharpening stick. They are surprisingly inexpensive. It will remove the metal residue very easily. Be careful not to overheat the diamond stick.