Saws should never be allowed to rust, for microscopic pitting of the steel will prevent the formation of really sharp edges on the teeth. They should be lightly oiled from time to time, particularly the bow- and compass-saws, etc. which are not often used. The best lubricant for use during sawing is a few strokes of a candle end along the blade. If the rip- and crosscut-saws are buckled they can only be restored by a skilled saw-doctor, but slight buckling of a backed tenon- or dovetail-saw can sometimes be overcome by gently tapping the back down first at one end and then the other, thus driving the blade further into the back.
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