Important: Safety Warning
This page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
This information has been left in for historical purposes but should not be acted upon.
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Adhesives, Paints, and Varnishes: Hence
Knotting. The knots in pine boards and other resinous woods contain turpentine, and unless they are "killed" the turpentine will ooze out and destroy the paint. Hence to kill knots apply with a brush a mixture of red and white lead ground with water and mixed with a strong glue size consisting of 2 to 4 ounces of glue to 1 gallon of water. Apply while warm to the knots with a brush. Follow with a second coat composed of 3 parts of white lead ground in oil and 1 part of red lead or litharge. When bone-dry, rub down with pumice stone.
Priming. After knotting, go over the surface with a very thin coat of priming, which consists of white lead with a very small quantity of dryer, as red lead or litharge, mixed with raw linseed oil. Use 1 pound of this priming for 18 or 20 square yards.
Have no more oil than is necessary to make the lead work readily, but apply repeatedly and work the coating out thin with a brush. Do not use a lot of thin priming.