I really have a problem with rust when it is on my cast iron pans. Other than that, I don't really mind. I can only imagine how corrosive the sea water is. I used to do some work for a water treatment plant and the chemicals mixed with the moisture in the air would really do a number on the computer cases.
Ohh yeah I know what you mean about the cast Iron pans
I grew up by the coast and rust was an issue on so many things, but I still find it interesting in some scenes