This type of antifouling paint appeals to the skipper who has the mistaken belief that commercial fishermen have access to better antifoul than yachties. The cheap price of the paint used by fishermen also deeply resonates with him. What sailor would not want a better product at a cheaper price?
In fact this type of antifoul suffer from crude formulations and are simply stuffed with basic biocides with little thought given to how these biocides are released over time. The idea that they contain more potent ingredients is a myth – as nasties such as TBT have been banned since the late 1980’s from paint destined for vessels under 25 m and since 2008 by the International Convention on the Control of Harmful Anti-fouling Systems on Ships for all vessels irrespective of length.
The yachtsman that uses fisherman’s antifoul fails to appreciate that his yacht might sit idle in the dock for weeks at a time whilst the fisherman goes out everyday. In addition the fisherman’s priority is rarely a smooth bottom – but rather, it is putting his boat back in the water as quickly as possible after a quick slap on, because if he is not fishing, he is not earning.
The use of such antifoul by yachtsmen is particularly popular in Greece and other Mediterranean countries. It is often particularly difficult to remove, as well as being incompatible with any other paint. The infamous Greek light blue paint is a good example.