Should I Get My Car Rust Proofed?

If done correctly, rust proofing should last for at least two years. ... According to Consumer Reports, “All modern cars are factory-treated for rust protection, and additional undercoating can do more harm than good.” Later on, your vehicle will need another rust proof treatment, but a new car is safe from rust's stain.

Is rust proofing a new car worth it?

Rustproofing works best for new vehicles, since the sooner you can treat your car, the more protected it'll be against corrosion. But used cars can benefit, too — and that's even true if your vehicle's already starting to rust.

Is rust proofing bad for your car?

“This particular kind of damage—repetitive surface damage—can leave exposed areas that become susceptible to corrosion.” If you update your ride every couple of years, getting a spray-on rust coating isn't worth it. But if you plan on driving your car into the ground, it can lengthen your car's life.