Hi folks,

I recently acquired an old Chestnut fiberglass canoe whose finish is
coming off the ash gunwales and the bow deck has some black moldy
nastiness that needs tending to.

I unscrewed and removed the deck only to find that hornets had made a
home by excavating a nest in the foam underneath the deck. The previous
owner delt with this by sealing them in with spray foam.

The entombed hornets have now been removed, but I am wondering what to
do about the foam. Should I fill in the cavity the hornets created, and
if so, with what?

Any help would be greatly appreciated.

Cheers,

Greg