you will get the rust in typical areas, depending on the model of car, because the ss models have the plastic sideskirts that protect the rocker panels from rusting out, so on an LS/LT, best to hit those as well
Cobaltkrazy: Turning aftermarket parts to dust, since 2006!!!
sideskirts only protect from damage and rust if people keep the car cleaned. salt, water, and dirt can get inbetween the skirts and rockers, build up over time and eventually lead to rust. also another common problem ive seen with the cobalts it the very bottom front corners of the doors tend to chip and the weather causes them to rust. this is because the doors slightly stick out further then the front fender. mine did this, had my body man adjust it a little better to make them even and it hasnt happened again
yea your not going to completely prevent it on every part of your car. if everyone did that then car sales would drop lol. you wanna get real depressed about rust? go look at the surface rust on certain areas underneath of your car or on your shosck and strut assemblies