For a cheap black paint for rough outside work, melt together equal parts of pitch and coal-tar, and thin to a working consistency with coal-tar naphtha. The naphtha may be dispensed with if the melted material is applied hot. A cheap red paint can be made by slaking lime with water and adding sufficient red oxide or Venetian red to colour it; apply it as if applying whitewash. Allow it to dry, and then brush over with silicate of soda solution (lpart of silicate to 4 or 6 parts of water). This paint will be found very durable.