Hatch Glass Replacement
My Hatches had acrylic lenses that were badly crazed. I took them right off the boat and brought them to a local glass shop. They replaced the old lenses with tinted lexan. While I had the hatches off the boat I took the oportunity to drill out the old screw holes using an oversized bit and filled them with thickened epoxy. I then drilled new smaller holes and rebedded the hatches. This should keep water from ever getting to the deck core, at least from this source. The boat was launched yesterday and the new hatch lenses look great.
Hope this helps, good luck.