My evolved plan based on feedback here:
My purpose is to strengthen the area before the damage gets bigger. On the inside of the hatch
lid grind out paint/gel around perimeter of the core
and some of the edge of core
(as pictured above) to give new glass some bite, and layup
3 layers of 6oz cloth with West 105 and 205. Sand smooth and paint
the inside of the hatch lid.
I don't want to do anything to the outside of the hatch for aesthetic purposes; its original non-skid and that would just be making the project
unnecessarily more complex. I'll snap a picture or two along the way, hopefully this weekend. Thank you all for the feedback.