Originally Posted by FourthCoast
I suspect my situation is different since my boat was in a slip on a freshwater river last year. However -- everything that touches that river for more than a couple hours comes out with a thick brown slime on it.
I had very good luck with the rattle-can anitifouling paint on my Honda outboard. I just sanded the old antifouling paint once over lightly with some 80-grit paper and sprayed. After the power wash in the fall the lower unit of the engine looked as good as, or maybe even better than, everything else below the water line.
Make sure to mask off your zincs first so they remain unpainted, especially in the salt water!
Do you recall how you prepped for the FIRST coat that you ever put on the engine?