Does anyone have information or views on antifoulings compatible with aluminium? Since tri butyl tin (TBT) was banned internationally we have used a US non-metallic product manufactured in Falmouth, Mass, by E Paints, with great success. This product SN-1, is used by the US Coast Guard on their aluminium craft and we have found it to have excellent antifouling properties in the Caribbean and the east coast of the USA and Canada (warm and cold waters).

One problem is that this product is not available outside the USA and, contemplating a move to European waters in 2013 we are already wondering what effective products are available in Europe?

Just completed my Ultrasonic anti fouling project whereupon, having figured out I had blown fuse, I pressed the button and, amazingly, it started making whale like utterances that must surely deter any sensitive minded barnacle. Never have been so excited by a red LED and a very high pitched series of squeaks. If nothing else it should keep dogs away! Maybe that 's why whales don 't get covered in barnacles? We fit it in the boat next weekend and then we will hoping for the best.