1) I'd use gold plating on every connector -- replace the old if possible. 2) For some casings, you might want to try seasoning it much like one would an iron skillet. That is, rub vegetable oil into the metal and then wipe dry. You can't do this for everything -- and you would have to remove the top covers, which contain air vents, before doing them. For front fact plates, you need to remove all the knobs and be very careful to keep the oil only on the outside (place on cloth and then rub). It would be a royal pain that needs to be repeated regularly. 3) Some components have a solid copper shield on the inside (e.g., the Cal Audio CL-10) which would help keep the salt out. Shop for those kinds of component or retrofit if possible.
4)??? I wonder if WD-40 hurts components (i.e., silicon spray). Any kind of non-conducting spray that does not absorb moisture could help (so long as the moisture doesn't bead up and do more damage thereby).
Fatparrot's suggestions are probably the simplest.
4)??? I wonder if WD-40 hurts components (i.e., silicon spray). Any kind of non-conducting spray that does not absorb moisture could help (so long as the moisture doesn't bead up and do more damage thereby).
Fatparrot's suggestions are probably the simplest.