Heavy-Duty Anti Rust's spray-on brown wax film sticks to bare metal or painted surfaces and won't crack, flake, or peel. Will self-heal if scratched. Use inside doors and rockers, where painting will not be required. Forms an air and water tight barrier which prevents and slows rust. Product can also be used to protect fresh machined surfaces and bare metal parts during storage, and works great to seal body seams that are inaccessible. Buy 3 or more and SAVE!