Although there have be advancements in the technology of refining and treating steel for the use in automobiles, the introduction of galvanization decades ago, and less metal parts on automobiles, they still do rust. The simple fact remains that steel is still the metal of choice for the production of automobiles and has a tendency to rust when introduced to a wet, salty, and humid environment. Although many people believe that with the introduction of galvanized steel the problem of rust was solved, The truth is that the galvanization process does slow the process but it can't stop it, and here is why.
First, the galvanization process is usually done prefabricated, say in sheets. Once these sheets are bent or welded, the galvanization coating can come off at the bend and welds. Where is this most prevalent? The bottom of your doors, which anyone can tell you is usually the first place rust is noticed.
Second, the coating can and does wear off eventually. Through normal wear and tear and weather conditions, the coating will wear off and leave the steel exposed.
The solution is rust protection by Ziebart. This coating not only covers exposed area but penetrates bends, seams, and other areas not protected during the manufacturing process, like the inside of the doors. (where do you think all that water on your window goes when you roll down your window?). And since Ziebart rust protection is touched up and reapplied where needed annually, it won't wear off since it is constantly updated. Even if a small stone or debris knocks a small piece off, it is self-sealing.
The question is, how long do you plan to own your car? If you are like most, you will drive it for eight years or more. To keep it looking great and protecting key areas from rust, Ziebart rust protection is the way to go.