To Paint in Varnish on Wood (Useful to Carriage Painters.)
1. The preparation of the wood, previous to the laying of colours, and the general process observed in laying them on it.
1) You must first lay on the wood two coats of Troyes-white, diluted with size water. Next, lay over these a third coat of ceruse. Then having mixed the colour you want with turpentine oil, add the varnish to it, and lay it on the wood, previously prepared as follows.
2) Polish the wood, first, with shavegrass or horsetail, and then with pounce-stone. Lay afterwards six or seven coats of colour mixed with varnish, allowing after each coat a sufficient time to dry, before laying on the next; then polish over the last coat with pounce-stone grinded on marble into a subtile powder. When this is done, lay two or three coats of pure white varnish. As soon as this dry, rub it over with a soft rag dipped into fine olive oil, then rub it with tripoly reduced into subtile powder; and having wiped it with a clean piece of linen, pass a piece of wash-leather all over it. “Valuable Secrets Concerning Arts and Trades.” 1780. P.93. From Chapter VI - Secrets Concerning Colours and Painting.