Some of keel
fairing chipped away. See picture. But the rest looks OK. No idea what is was, but feels rubbery. I don't think there is any structural issue there, no water
seeping out. So question N1: should I remove the entire seal all around and re-do or just that area?
And N2: how do I seal the joint? Some epoxy
fairing like Watertite / thickened fairing epoxy
? Or just patch with 5200? The hull