Whetting plane iron ground bevel.
Whetting plane irons ground bevel, cover the whetstone with kerosene to prevent the stone from clogging with metal particles, rust etc. Hold the plane iron as in the image resting flat on the ground edge move the iron in the direction of the arrow for a few strokes. Look at the ground edge you will see the action of the whetstone on the surface. Now turn the iron over and whet the flat side.