To be honest mate, I don't like them with the arches on, particularly on the Highline version. They make the car look wider and cluttered, and it can tend to make the wheels look lost in the arches. Obviously this is just my opinion, and at the end of the day its your car now, and you have an idea of what you want it too look like! It'd be boring if we all thought the same! As for the rust/protection issues, Vince(Mangold) is a meticulous cleaner of cars and I know for a fact that VR has had several cans of waxoil coated all over it! So that shouldn't be a problem! Simon.