Rust-Oleum American Accents Metallic Leafing Pens are designed to decorate and personalize items around the home such as picture frames, candy jars, vases, storage bins, greeting cards, candle holders and more. Used on wood, metal, glass, unglazed ceramic, paperboard and some plastics. The Metallic Leafing Pen is suitable for used outdoors on mailboxes, planters and birdhouses.