Yes indeed! genuine Gold Paint is sold by Fine Artist's suppliers like 'Cornelissens' in London. It is usually water soluable, and is often sold as a small spot of Gold about the size of a match-head loaded into a sea shell, which can be used as a pallette. It is used in book and manuscript illumination as well as painting, and because it is real gold, can be burnished to a high lustre. If the artist wishes to change the colour, for instance red gold or green gold, the water soluble gold paint is applied over an undercoat of the correct colour. Brick-red or earth-green. Fine clay powder may be added to the undercoat, as it presents a raised surface which also helps to produce a high lustre burnish. Clay under a microscope looks like flat scales, much like graphite, and so can be polished.