Ok so I am pulling the prop off to get conditioned and I believe I am dealing with some electrolysis. I bought this boat (38 holland) end of June in Rockland, Me and part of the commisioning of the boat (by the broker) was to install zincs, including prop nut zinc. It as never done and I dove on the boat to do it myself and was unable to underwater, for whatever reason. Anyhow this what I am dealing with. Thoughts?