rust proofing helps slow rust - especially on rust Mazdas of any generation.
that is all
rust proofing helps slow rust - especially on rust Mazdas of any generation.
that is all
There are two kinds of rust, surface rust and perforation rust. Surface rust is where the body panels rust from the outside in, if you keep a coat of paint on your car, then that's your primary protection. Perforation rust is where the metal rusts from the inside out, under the paint and there isn't anything you can do about that. Hydrophobic coatings of all types, like the ones applied by Krown are meant to get water off your car as fast as possible, but can also trap grit and salt sometimes. There haven't been any real studies on the effectiveness of this sort of rustproofing on modern cars (there have been a few on the electronic type and it turns out they don't work at all), so it may or may not work. I owned my 2010 Mazda 3 for 7 1/2 years and street parked it in Toronto the whole time. It never had any signs of rust.
I wouldn't worry too much about rust, because as long as you maintain your car you're not likely to have bad rust issues unless your car has a manufacturing issue with the steel, then you're covered by Mazda's 7-year perforation warranty.