Metal Rescue™ Rust Remover Bath is formulated for use on iron and steel. We have coined the phrase “safe on everything except rust” because the Metal Rescue water-based formula literally acts like a magnet to rust. Metal Rescue removes rust from metal but it will not harm other materials such as wood, glass, rubber, vinyl or plastic. In three easy steps you can de-rust your metal parts: simply soak, check, rinse /dry. Like the entire line of Workshop Hero™ products, Metal Rescue is designed for those who want less work and more play!