shellac

When partially exhausted the aluminum shutters are dipped into a bath of shellac.

When the stone is warm wipe off the oil which the heat has driven out and apply a couple of coats of shellac to the broken ends.

When the shellac is thoroughly dry, warm the stone again to melt the shellac, and clamp the pieces together.

Good white shellac makes the best finish for the seat; the stool itself may be finished to suit.

This metal tube should be coated with thick shellac, and the paper tube slipped over it for 1 in.