Fixing iron oxidation is great, my old VW would appreciate it, but I don't see how it helps much... and I'm sure marine coatings have a long history and a lot of technology invested. Wouldn't a systematically-better approach be to do as much local-to-customer, JIT manufacturing and stop shipping finished goods all over the world? If not just for climate-change but for reduced time-to-customer? (Caveat: Still must ship materials and specialized/complex goods that aren't available locally.)