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r13 said..
I thought you were going to give away mucking about with additives including chilli, as per this 14/9/22 post
Antifoul in paint | Sailing Forums, page 1 - Seabreeze
Yes because they are toxic. Capsaicin is not toxic and I am wondering if anybody has used this substance and their experience. I will never stop making around experimenting. That is just me. In addition to that I completed my test with two different samples. One sample was just a normal PPG anti graffiti paint and a second sample was the same paint but titanium oxide was added. The result were stunning. Titanium oxide performed extremely well, just a tinny bit of slime! Have a look at this after a full year in the sea water. Amazing!

If I could get the same results with chilli powder extract called capsaicin we are all good.