I live on North Padre Island in Corpus Christi. I am literally surrounded by salt water. I keep pins in the garage, even during the 6 month summer when temps hover between 95 and 105 and humidity chimes in around 100% most days. I have not had a single moisture related problem. I DO keep all my back glasses in the climate controlled indoors areas. The beach is three blocks in one direction and there are saltwater canals right across the street.