After the carriage has the full amount of varnish on, it must stand by for at least four mouths for the varnish to get thoroughly hard; it may then be very lightly faced down with pumice-stone and water, and polished up with rotten-stone and linseed oil, using a rubber of some soft material. Should it have a dull look when finished, owing perhaps to too much oil being used, rub over briskly with a mixture of equal parts of vinegar and oil applied with a pad of cotton wadding.