Roger strip keel to bare lead. Clean metal with a wire brush on a drill or grinder. ?Get any oxidation off. Immediately roll on epoxy resin with no filler. Wire brush the keel and resin. Let it cure then fair with an epoxy based fairing compound. Give it a lightening before fairing. I did our ?S42 14 years ago and have had no failures.?
Cheers!
?
Bob
Viitesse
Lake Ontario