sorry for the delayed reply, I’m working out of town and having problems logging on.
Any tips Lew?
Who,me?!? I was the one that brought it up! Move to Phoenix, maybe? 
But you all are right. It isn’t the same as the deep penetration, water-borne, corrosives like road salt; more surface oriented. Even pressure washing doesn’t seem to help, and in fact may exacerbate the problem by driving salt further into crevices.
Here in the Pismo Beach area the $0.25 car washes are required to use a percentage of water that is captured by their drain, filtered (for solids) and recycled. Considering that we have the only drive-on beach in the state, and most folks like to wash off their vehicles after exiting the beach, they aren’t the best choice for washing off beach salt; or anything else that you cherish. But not many people are aware of the situation.
How’s that for topic drift? 