Home Crafts Mineral Oil – This all-natural substance can be used to give all your furniture a good shine; use it straight, or add a few drops of essential oil or lemon juice to add a pleasant scent. You can also use mineral oil to rehydrate wooden cutting boards and prevent splits and cracks, which can harbor dangerous bacteria. Simply use a clean cloth to rub the oil into the board, working in the direction of the grain; let it absorb for several minutes, then wipe off excess oil with a clean, dry cloth.