Fresh water, no problemo, clean as normal......, salt water, you'd need to rinse it down with hot fresh water, then clean as normal.
I helped Dwight Van Brunt, vice president of Kimber , pull Kimber rifle number one and two, chamber'd in the then new .325 short magnum and .300 short magnum out his guides plane when it went through the ice one spring 300 yards off shore, right outside of Kotzebue. Col. Craig Boddington and him had been Brown Bear hunting up the Noatak way to test the effectiveness of the nes chamberings, and Dwights guide taxi'd in on thin ice..........untill ''Ploop''.
We had an interesting conversation on that thin ice, holes and overflow all around, and found we had lived very near each other, many years back, in Montana.
We cut the top off the cub and unloaded it while guys got ropes and innertubes together to lift and flip the plane up and out of the ice.
As I admired them (BRAND Spankin' new) I told the shivering fella to go to his hotel room and take a shower with them, and get the salt off. Later that night he reported all was well and the quick rinse saved the guns, at least cosmedicly......true story.