"Cork" paint, sometimes used on ships' ironwork to prevent it rusting, is composed principally of white lead, oil, varnish, and quick driers. After the surface to be treated has been scraped and red leaded, the paint is applied, and granulated cork is thrown on to the wet surface; when thoroughly set, the cork is painted over. This method is only adopted where the space is to be utilised for sleeping accommodation, and where the iron is not specified to be covered with wood. This method is rarely employed in the merchant service, but in cruisers, where as little wood as possible is used, cork is freely made use of, being generally mixed up in the paint shop of the yard where the work is done.