Whether you plow or don’t, living in the northeast we are all exposed to the salty road conditions. They spray liquid solution on the roads before it snows now to prevent the snow from sticking and to accelerate the melting process. I travel several hours north to go snowmobiling and by the time I reach camp my blue truck is white from the salt solution. once a week I wash the truck and spray underneath to clean the salt off. I have never had any issues with premature rusting. Every truck that I have owned since 1992 has had a plow on it, I never had a rusting issue.