Just had the boat hauled for a new bottom job, when the yard was pressure washing the bottom. big section of the covering on the keel wing tops came off right to its lead base material.
I have no idea what material Catalina uses to encapsulate the keel, but its razor thin in some section and certeinly is not adherring well to the lead material. I was thinking of just removing the rest of the covering and applying several coats of thickened Epoxy and then finish with the bottom paint! Any thoughts?? :?
Before you put on epoxy you need to sand to bright metal (with suitable protection) and use an acid-etching primer. I suggest contacting International Paint (now a part of Akzo Nobel), They can tell you how to do it right so the coating doesn't come off again.
Bernd : The material coming off is an epoxy filler over the lead. Follow what Ted has suggested.
From my readings I understand that you have to work quickly as lead oxidises fairly rapidly and the lead oxide is why the epoxy won't adhere. :cry4`