In another thread the topic of how to get salt off a bike which got road salt on it was mentioned.
I have a boat and SeaDoos that I run down in the Gulf of Mexico, which is way salty.
When I am finished using them I spray them off with fresh water. Then I spray them and flush the engines with some stuff called Salt Away. It comes with an applicator that you hook on to the end of your garden hose so you can spray it in all the nooks and crannies.
It works great, all my saltwater toys look like brand new.
You can get it on Amazon. It really works and I think it would be good to get the salt off the inside of the fenders etc.