Based on the responses, my original approach appears sound. Rough up the exposed lead well (bright surface), coat it with unfilled epoxy, let it set some (tacky),and coat it with filled epoxy, full cure and the feather contour blend into remaining keel.
And yes, I do know that lead oxidizes as does aluminum and most metals. Little tidbit I learned in PhD Materials Eng school. And as you pointed out, bonding to some of these fast forming metal oxides can be an issue.
Thanks all for the advice.
If you liked my advice/response, give me some rep points. If you didn't......well what do you expect, it was free.