Vintage Jewellery - Make sure to store your jewellery away from humidity and air. To keep your jewellery properly protected, store it in a drawstring bag or jewellery box. Certain metals begin to tarnish when exposed to humidity. Silver polishes work well to remove tarnish, but certain metals, such as bronze, may not polish well. The polish may remove the surface coating and then the metal underneath, such as copper, becomes visible.