Renaissance Wax is a brand of microcrystalline wax polish that is encountered in antique restoration and museum conservation. It is not appropriate for all materials, and is most safely used on metal objects. However, it is also used for the polish and conservation of gemstones and of organic materials such as wood, ivory, and tortoiseshell. Renaissance Wax is sometimes used by reenactors of historic swordsmanship to protect armor and weapons. Waxes are more protective and longer-lasting than oil, especially for swords and helmets that are frequently touched by human hands. It has recently been introduced in the world of guitar building, as a finish that protects and gives colour to the wood.