This sort of anti-fouling is the holy grail.<p>Copper based anti-fouling goes back centuries. The <i>USS Constitution</i> was copper bottomed in 1794.<p><a href="https://ussconstitutionmuseum.org/2015/08/12/copperbottomed/" rel="nofollow">https://ussconstitutionmuseum.org/2015/08/12/copperbottomed/</a><p>I remember an NPR story about using <i>extremely</i> hot peppers (adding capsaicin to bottom paint) to defoul.<p>There was an anti-stick bottom paint but the trouble with it was that it wouldn't stick to hull.<p>The trouble with copper is that it's a biocide, it kills. You're basically putting poison on the bottom of your bottom which leaches into the soil. Like tributyltin, copper's days are numbered.<p>It's a hard problem. When I get back into sailing, it'll be dry sailing (put boat in water and haul out when done). BTW, bottom jobs are freaky expensive, $10,000 for a race bottom every year.