Plastic preservation, a new method of preserving equipment on disused warships, is now being used by the Australian Navy. The process seals apparatus against the ravages of air, moisture, and weather at a low cost for periods up to fifty years. These picture were taken aboard H.M.A.S. Cowra, a corvette now in reserve, in Sydney Harbour. Left: A gun, covered with ***** webbing of tape is sprayed with liquid plastic, which forms a gossamer of fine threads. June 5, 1947. (Photo by Norman E Brown/Fa