To protect the gilded surfaces from scratch and tarnish you need to use a sealer. Shellac is the most cost effective leaf protection and is the fastest-drying primers available but its 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 it dries to an attractive clear semi-gloss finish that preserves the lustre of the leaf beneath. It’s unique acrylic formula means that it is quick-drying and easy to wash up with warm water and soap.