There's a product called Prop-Speed that I used on the prop, shaft, and rudder on my 2520 inboard for anti-fouling protection. It consists of an etching agent, primer, and final coat. It's very effective and will adhere to the tabs but is very expensive. I bought a small kit (200 ml) at West for $230 and didn't have enough to do my tabs. A 500 ml kit sells for $360, and should do a set of tabs fully. A 1000ml kit is $469. yikes! Makes Tri-lux look pretty attractive. I think (hope) it will go 2 years without re-application. Again, Prop-Speed's expensive, but it really works well. It's pretty standard use now on big / fast inboards and sportfish.
