Is rustproofing your car worth it? In short, yes! Rust is a car’s natural enemy. More than just a discoloration of metal, rust is the corrosive result of a chemical reaction between oxygen and iron. Though rust technically corrodes just the surface of iron or an iron-based alloy (such as steel), fresh iron is exposed during this process of corrosion, which in turn can become “infected” with rust. Given enough time, this cycle will repeat over and over to the point when the rust completely disintegrates the metal. Put simply: Rusted metal is not as structurally strong as rust-free metal. Since most cars are made of metal (especially...