Yes, it's well above the lead. It's just fibreglass. I was thinking I could fill it with epoxy somehow. Can you give me specific links to what I need. That would help a lot. Not structural at all. I just don't want it to pop out. There will be a coat of bottom paint going over the whole keel when finished.
Get Bondo with fiber impregnated into it. It'll be strong, easy to shape after it sets up and will take paint well.
