After arriving in Portland , we were reorganizing, and noticed major dampness in one of the cabin lockers and a storage cabinet on the starboard side in the forward cabin. After careful inspection, we noticed the screws protruding inside the locker were also rusty. We turned the heat on inside the cabin to dry things up. After the area inside the lockers dried up a bit, we noticed salt on the wood.
We removed the starboard rubrail last weekend, cleaned the area, applied 5200 in the trough and a big blob in each screw hole. We reattached the rubrail last Saturday.
We had unusually dry weather all week, giving time for the 5200 to cure. Saturday we got hit with a powerful storm and lots of rain. Thankfully, we noticed none of the moisture we were getting before in the locker.
Success!