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Then the pitting in the softer body and socket steel drawfiled out. Not all of the backside pits could be removed without thinning the lamination too severely, but the few remaining can be worked around in future resharpenings. I do nothing to the gouge’s cannel or inside face, because it isn’t necessary.
A soft wire brush used against the direction of grinding and filing smoothes the surface…
… and the freshly-cleaned steel is treated overnight with phosphoric acid, which reacts with any remaining rust in the pits to form harmless iron phosphate, which also leaves a gray surface on the clean steel. This is basically the same treatment developed during WWI to “Parkerize” bare steel in military weapons... and is still used today.
While the phosphoric acid is working, I turn a handle…
…and fit it to the socket.
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