colourish

Noun

 * 1)  A substance used in gilding to brighten the finish of the gilded object.
 * 2) * 1671,, Some Considerations Touching the Usefulnesse of Experimental Naturall Philosophy, Oxford: Ric. Davis, Volume 2, Essay I, Section V, p. 27,
 * For having by this means overlaid it evenly with Gold, they can easily with fire force away the Mercury; and, with a liquor impregnated with Nitre, Verdigrease, Sal Armoniack, and other Saline Bodies, which they call a Colourish, restore its lustre to the remaining Gold, which they after make bright by polishing.
 * For having by this means overlaid it evenly with Gold, they can easily with fire force away the Mercury; and, with a liquor impregnated with Nitre, Verdigrease, Sal Armoniack, and other Saline Bodies, which they call a Colourish, restore its lustre to the remaining Gold, which they after make bright by polishing.

Verb

 * 1)  To add colour to, to brighten with colour.