Ok Thanks, you figure thats the best. Have you tried underbody seal? This is what it says... Hammerite Underbody Seal
Gives heavy duty protection for areas that are most prone to abrasion and high impact - ideal for wheel arches, floor panels and other underbody areas
Protects against stones, water and salt prolonging your vehicle痴 life
Powerful rust inhibitors based on the proven Waxoyl system displace moisture and seal the surface against further corrosion
Just wondering