This video is about Gold Leaf, Gilding, Metal Leaf, How To, Painting

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"Silver, composition and copper leaves tarnish quickly if not sealed with an oilbased varnish, shellac or size. Avoid touching until sealed as fingerprints show. To enrich the color of composition leaf, apply a thin coat of transparent yellow oxide oil paint before sealing.

Gold and aluminum leaves will not tarnish. They do not require a finishing varnish, unless used in pieces which demand regular handling, such as furniture. When used regularly, an oilbased varnish will seal and protect gold and aluminum leaves. When metallic leaves are used in external environments, they need to be protected against atmospheric elements in the same way as painted objects or murals."
from http://www.danielsmith.com/contenti...