Exactly what Rex said
I have electroless plated many parts and fasteners rather than paint or other plating. The new car was only once on the salt, but every plated part is in excellent shape. The non plated or cad plated stuff not so good. I have a huge box of new stuff to go next week.
Plated hex drive dzus buttons still look new. I am convinced in the benefit, and am a good customer. I'm trying to make him a sponsor.......
It is not perfect, but really close.