: any pointers on how to do this? I'd imagine the edges would require
: a bit more sanding; then a thin strip of fg wrapped around? Same
: for the exposed hatch opening, before gluing in the 'lip'?

There are probably better ways than this but here is what i did last time:
-put masking tape along the inside and outside of the hatch close to the edge.
-bias cut a 2" wide strip of 4oz glass long enough to go around the hatch.
-taped one edge of the glass to the masking tape on the inside of the hatch.
-cut a piece of thin polyethylene about 3-4" bigger than the hatch and taped it to the tape on the inside of the hatch.
-applied epoxy to the edge and glass.
-pulled the poly around the edge of the hatch and tapped it to the outside surface of the hatch.
If the poly is thin and you pull it tight enough the wrinkles will come out of it and it will hold the glass tight against the edge. You shouldn't need to fill it and the inside and outside of the hatch near the edge will be clean due to the masking tape. Obviously you cut off the excess glass by running a knife along the edges while the epoxy is still green. The person who commented on rounded versus sharp corners on the edge (Jay I think) made a good point: you aren't going to end up with much glass over a sharp edge or at least what glass you get there won't stay there as long as glass over a rounded edge.

Ric