Bleeding: This term is applied to the discoloration which occurs when an underlying colour or strain gradually strikes through a newly applied paint film (either oil paint or distemper),due to its being soluble in the paint medium. Among the materials causing this defect are lakes and dyestuffs (chiefly reds and purples),cheap black japans, tar and creosote preparation, knots and resinous timber, mica and metallic bronzes. Remedy: The best remedy is to strip off the affected paint, remove underlying causes of the bleeding and re-paint entirely. In certain cases it is important to remove the original cause of the trouble, especially where the stain is within the surface to be painted ( as in the case of creosote). In such cases the surface should be sealed with two coats of Duracoat Aluminium Spirit –Based Sealer. Knots and resinous timber can usually be sealed with ordinary Duracoat Polyurethane Clear.