A good mechanic can tell if a car has been driven in the "salt belt" just by looking at the rust in the undercarriage.  Salt and liquid brine solutions help manage ice on the roads.  Unfortunately these road treatments accelerate rust and corrosion processes.  Liquid de-icing is especially harmful as it can reach further and be trapped in body cavities, cracks, and spot welds.  Throughout the season trapped moisture freezes, thaws, and ruptures paint, creating opportunities for rust to take hold and develop in the heat of the warmer months.

Defend against winter wear with NH Oil Undercoating®!  Take it from those that know snow: the Canadian Army uses rustproofing to maintain its vehicles and the Canadian Automobile Association recommends it for all drivers.