I personally use the rust check spray system. It is quite similar to the Krown spray in the fact that they both are sprays that can be applied wet and actually repel water and get into all the crevices that water can get into. It prevents that water from freezing and flexing the metal which is why rust starts in the first place.
From what I remember, and if I'm wrong, someone please correct me, ziebart is a hard spray coating which covers everything. The problem is that if it chips, and water gets underneath the coating, your car can rust out and you'll never know it.
i just got home from the dealer and ordering a 2012 Crew in Brilliant Red Tri coat and the countdown to delivery begins.... Now to sell my current Mazda 3 Sport....
oh, BTW, I'm KEvin and i'm in Scarborough Ontario...