I had a post on here last year if anyone remembers and @MarcusBrown came through with a replacement fin ... it too is corroding , I religiously rinse my gear with fresh water and as a previous poster mentioned I now soak the entire bottom of ski in a 5 gallon bucket of fresh after every session AFTER rinsing with hose. It does not seem to help. I think the issue is some salt sediment gets trapped in the grooves between ski, plates, fin, fin box , clamps as they all have a tell tale sign of white residue when the ski comes out in the late spring. Is there a product that "creeps" that anyone can recommend ? I am afraid of affecting the actually top sheet of the ski by using a petroleum based product (not to mention I don't want to put into the environment) Nice post @Horton