I have not bothered masking the crack. The resin does drip through a little. I just carve the excess off with a chisel while the resin is still somewhat soft. I just haven't come up with a good way to fill in the gap. I'm open to suggestions.

> This question is specifically about the technique that Nick describes in
> his book: When taping the hatch cutout back in place in preparation for
> making the glass ledge, do you somehow seal the crack between the hatch
> cover and the opening to prevent the epoxy from leaking in? I plan to use
> graphite to color the epoxy, and I didn't want it filling the crack and
> being visible on the outside. Is this just a matter of being careful not
> to apply too much epoxy, or should the crack be masked somehow? Thanks!