Join Date: Feb 2010
Location: Narragansett Bay
Thanked 230 Times in 215 Posts
Rep Power: 7
I would bet on mold, but I've also seen black boats that are stored outside over the winter without a cover and are located near smoke stack manufacturing towns. That happens in the summer as well, but not to that degree. Where is the boat and how was it stored before you found it like this?
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In the harsh marine environment, something is always in need of repair. Margaritas fix everything.