| Show cracking Se sealing alinn chief causes of paint weathering rim cracking and sealing are two of the methods by which paint weathers some of the causes of this painters say are the use of paints containing an excess of hard pigments heavy coats of paint not properly rubbed out paints mixed with an excess of fatty linseed oil or cheap paints paint S containing an excess of unsuitable pigments and oils which form a brittle in tead stead of an elastic film other reasons advanced by paint authorities are painting over a peeling ciack ing or scaling old coat without removing the old paint pr p ming ining with such pigments as iron oxide venetian red ochre achre or dutch pink long deferred repainting especially when a brittle or paint was used previously and painting over wood having an excess ot of resin in it AU ali paint experts advise against spacing ing the paintings over too ion long 9 per ioda |