Case-study carried out at the Textile Conservation Studies at Hampton Court Palace (United Kingdom). The Canopy of State consisting of crimson silk damask, sewn onto a buckram backing with a linen thread, decorated with metal braid - suffered damage during a 1986 fire (melted lead had solidified on the braid) and required conservation treatment. Several experiments in chemical cleaning were carried out: first, Silver Dip (TM) was used and gave good results, and then the mineral acid in Silver Dip was replaced with organic acid, methanoic (formic) acid, followed by gentle brushing with an aqueous solution of 3% formic acid and 2% thiourea. Results were as good as Silver Dip. Next, a non-aqueous treatment was tried: 3% formic acid and 2% thiourea in propanone (acetone), also with good results. Final analysis of samples of cleaned metal showed corrosion to be no longer present. The silk/buckram components were then soaked in the cleaning solution and then tensile-strength tested. No significant loss of strength was shown. Final steps included an attempt to lacquer using methacrylate resins and electrostatic air-brush application, to coat the metal. Results were unsuccessful.