I like the do unto others approach.
I totally agree.
In my slip are several old pilings. Coated with creosote. These are pretty old maybe 40 yrs or more old.
One of these pilings leaks
a constant tiny sheen on the water with little swirly eddies.
I watched it very carefully cause I was worried about my boat leaking some kind of oil
even though the pumps dont pump.
I asked my slipmate and he told me the creosote is leaking out but its not oil
. And it has been doing it for years.
This marina is a workmans marina with a lot of poor crabbers, wooden deadrises, old guys and a lot of 2 cycle detroit diesels. There is often a slight sheen that comes and goes all the time around all the boats.
Another fellow has a 45 foot fiberglass
something with lots of shiny white and stainless and multiple decks. One day he started and ran his detroits at the slip for what must have been 2 hours. A soot was spread all over the marina water, sort of like a carbony looking dust, like a halfway sheen, not a sheen but like a sheen.