Young's Demonstrative Translation of Scientific Secrets · Chapter 44296. To Paint in Imitation of Black Walnut

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Wash the surface of the wood with weak alum-water, after being well sand-papered; then go over it with linseed oil, coloured with murat amber and red lead. It is better to have this colour rather light, and renew the application; when this has sufficiently dried, go over the surface with a strong sizing of transparent glue, and then use two castors of copal varnish. Any good grained pine will bear a very close resemblance to walnut, and the surface will be nearly as hard.