Use a sealer to protect the gilded surfaces from scratch and tarnish. Shellac is the most cost-effective leaf protection and fastest-drying primer available, but it’s for indoor use only. Kölner Leaf Protect is designed to seal imitation leaf and prevent oxidation without causing a reaction to the leaf. Leafs such as copper or imitation gold can be protected with no risk of discolouration, and they dry to an attractive, clear, semi-gloss finish that preserves the lustre of the leaf beneath. Its unique acrylic formula makes it quick-drying and easy to wash up with warm water and soap.