Here are some reasons why modern cars are more rust-resistant:
* Galvanized steel: Most modern cars are made with galvanized steel, which is coated with a layer of zinc to protect it from corrosion. This coating helps to prevent rust from forming, even if the paint is scratched or chipped.
* Underbody coatings: Many modern cars also have a protective coating on the underside of the vehicle, which helps to protect it from road salt and other corrosive elements.
* Plastic parts: Modern cars also use more plastic parts than older cars, which are not susceptible to rust.
* Improved paint quality: The paint on modern cars is also more durable and chip-resistant than it used to be, which helps to protect the metal underneath from corrosion.
As a result of these improvements, modern cars are much less likely to rust than older cars. In fact, some automakers now offer warranties against rust perforation for up to 10 years.
