Barry:
Drill the hole you want.  Then I use a little "L"  shaped tool (a bent nail will work) chucked in the Makita or electric drill,  to route out the honeycomb. Blow out the residue, clean with MEK or whatever you use;  fill with flox. (Plug the inside surface with packing tape or peelply, if possible, to prevent the flox from going everywhere).  When dry, redrill the hole.

If your going to recess a screw, grind the head to form a rectangle, then install with flox.  After smoothing, cover with a 1-bid of thin fiberglass.  Then smooth with thin micro.

If you want to use a surface for a structural support that has no substrate (honeycomb), I would think it necessary to buildin a substantial structure to provide the necessary support and start from there.

I'm not the pro here but this works for me  Regards, Bill Hogarty