1) Stoning is to be performed only on used gage blocks where the surface finish may be degraded by scratches or small nicks.
2) Make sure the stone is clean and dry--free from any dirt or abrasive compound. Abrasives on the stone may lap the block and significantly alter its size.
3) With a light amount of pressure, stroke the block across the serration two or three times. (Forward, back, and forward.) It is not recommended that more than light pressure be used unless necessary to remove nicks and burrs.
4) Listen and feel for nicks and burrs that might be present. If the block glides easily across the stone without a scraping sound or clicking or jumping across the serration, then stop. Flip the block over, and repeat on the other side.
5) If nicks and burrs are detected, repeat the procedure but not more than twice more. The pressure may be increased each time as needed to try to remove the nicks and burrs. Use not more then seven strokes per session.
6) If repeated attempts are unsuccessful at removing the burrs, examine the block for damage. It is not likely a block would be wringable in this condition.