BS-40 protects metal from rust and corrosion, penetrates stuck parts, displaces moisture, and lubricates just about anything. *Example: -Eliminates squeaking from locks, in-line skates and baby strollers. -Cleans and protects bicycle parts from rusting. -Cleans and protects fishing gears, boat hardware and fittings. -It's also suitable for door, door lock, padlocks, stainless steel surface, remove sticker and etc. *How to Remove Rust? 1) Spray BS-40 MULTI PURPOSE LUBRICANT on rusted tools or things for 10 minutes. 2) Scrub to clean or remove rust and wipe until it dry.