Hello All-
I have a 42' 1956 Chris Craft Constellation. I have been noticing some kind of deterioration along the ribs in the engine room. Photo attached. What is causing this and how to prevent? The boat is kept in a covered slip in the water year round in Virginia. There is no fresh water penetration into the affected area. The deterioration is now in several spots, all in engine room, at least that's what can be seen. There is no other rot in the usual places, around windows, decks, etc.
Thanks so much.