In March I hauled out and sprayed the propeller with galvanizing paint.
To cut a long story short. It didn't work.It is about as effective as nothing.It was an experiment, because where I am is a very productive aquaculture area.
Oysters. mussels, scallops and a variety of edible seaweed thrive.
All of the boats get about 8 months from professional prop coating.
I have a feeling that the antifouling and prop coatings are environmentally benign to protect the crops.
In other words. not very effective.
So I gave gal paint a try.
Oh well it was worth a try.
gary