I just picked up my first whetstone (1000/3000 Tojiro) and it arrived damaged. Two corners were chipped off. I don't want the stone to go to waste but I would have to remove about a quarter inch of material. Any suggestions on the best way to do this? YouTube says I should rub it on the sidewalk. But that seems neither practical nor very accurate in terms of getting a perfectly flat stone. Any suggestions welcomed.
