Last year at our fall haulout a 1ft^2 area of 1/8" thick fairing compound on the side of the keel was found to be loose and was removed exposing bare shiny smooth lead. It was repainted with no preparation with Micron CSC. By the time we got to the Bahamas in March, the bottom paint had disapeared from that area of the keel and also (as usual) from the leading edge and bottom of the keel where bare corroded and barnacle root covered lead had been painted over.
This year I had all of the fairing compound removed from the metal part of the keel, the lead ground to a rough bright surface, then following International's recommendations the surface was treated with a wash, 9 coats of Interprotect epoxy, a little fairing was done, and then it was painted with Micron Extra.
We will see how that works.
1988 PSC 34