OK all you
millions of hundreds of four readers out there, I need your help. On Eolian's decks hundreds of black spots are slowly appearing, and have been ever since we repainted the decks. They don't grow fast, but they do grow. Nothing seems to touch them - using straight bleach has no more effect than plain water.
My questions to you are these:
- What is this stuff? Is it a lichen of some kind?
- Does anyone have any experience with it, or are we the only ones?
- Most importantly, how do we get rid of it?