I have a 1970 GMC 1/2 ton pu that is a one owner rust-free truck. It spent its life in Alabama and now its up in NJ. What is the best way to undercoat/rust proof the truck so that it will last up north? The rockers and cab corners are notorious for rot so I'd like to do what I can upfront to keep this from happening.
Thanks for the info.
Mac
