To remove dents, with a blowpipe or soldering bit carefully solder in the hollow a suitable brass plug. When cold, take hold of the plug and pull the dent carefully out. Then unsolder the plug, and wipe off the melted solder with cotton waste or rag. With very fine emery cloth remove every trace of solder. To remove dirt, etc., use turpentine applied with a rag; afterwards, rottenstone and oil, or tripoli and oil. Finish off with list and dry powdered lime.