No I wasn't on about R&D; what I was really on about was the way the thread had gone amiss.
Someone asked about adding copper to anti fouling. Im time past there was much more copper in anti fouling but with the price of copper these days the R&D guys decided that anti fouling didn't need as much - figure that out against logic!!! I'm not sure that copper would have done much for control of marine growth; and that seems to be the yachties grip about anti fouling paint.
MMNETSEA; I used curry and mustard powders, not capsicum and not heard of it being used. The 'old salties' in the past either used curry, mustard or chillie; or a mixture. The last I recall having seen it used was I guess 30 odd yaers back till I began the experimant first on Camel Dung; my tender and then on Bedouin. I had a guess at what seemed a reasonable ratio and from the results so far I think it pretty right. The growth of perriwinkles on the prop after 10 weeks was a very heavy full coverage and absolutely nothing on the hull. Where I'm now anchored I have had growth on new anti fouling in less time than that.