Same story here on a N30. The manual talks about the keel attachment process, whereas they glue and bolt the keel on and then 'permanently' (whatever that means in saltwater) seal the keelbolts against corrosion. The bilge on my N30 is smooth FG, no bolts sticking out. I too found, that the fairing compound is pretty soft.
Doeas anyone have good experience with glassing the lead in? Epoxy or polyester resin??
Make sure you don't do too much lead grinding / sanding or it could be a quick way to the bottom of the ocean (for yourself that is, ha!)