Why get rid, it’s only an advisory for corrosion.
I’ve never seen any of those older type trucks that aren’t corroded, but year after year they go through the MOT.
D40 Navara - it is mostly the original coating degrading and some surface corrosion but if not treated the metal will almost certainly start weakening a lot quicker than normal - it is from the last batch built so hopefully less likely to be affected by the snapping issue though.