J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment Keel Preparation

Over the last few seasons my keel has developed exposed lead on both sides. This happened gradually through mild sanding (see photo). It seems like there is a barrier coat in places but not over the entire surface. I've been repairing to some success with 1 or 2 coats of epoxy. Anyone come across this? What's the best solution? Do I need to strip the entire keel of paint and apply a barrier coat or epoxy coats before painting? thanks for all replies/comments!