Hello, My Dad is getting a new car, and it's likely to be the last car he will have. We need the car to last for a while, and in our climate (snowy winters with road salting, rainy spring and autumns) that means corrosion protection. The car will be a Ford Focus. I assume the underside of the car and the wheel wells will have some kind of factory-applied paint or coating. We would normally take the car to a corrosion protection shop, but their treatment is not cheap and only protects for about 2 years. Would the three-product process finishing with RustSeal work well on the underside of a new car, which presumably has some factory-applied coating already? Which areas of the car are most suitable for a DYI application of KBS' products? How much of the RustClean, RustBlast and RustSeal would roughly be needed for a Ford Focus? Thank you!