In an effort to make good contact between hull and anodes I realized the key was the bolt through the Aluminum, not necessarily the back side of the anode as it usually gets scum between it every season. I still sand and clean both mating surfaces but this year I got the idea of cleaning the bolt holes in the skeg, rudders and trim tabs. Got couple old pistol bore brushes and using the cordless drill I shined the heck out of the holes. Ya, I used a stainless brush but I figured a small area like that would be fine. I wiped any dust away with wet rag. Also brushed the anode holes.
Now I should have good contact.
Here is a
pic of the brush I used.
-Karl
1986, 32' Sedan, twin 360ci, 275hp Chrysler's w/ K&N flame arrestors