I created a mold of the anchor hatch receiver out of mdf. I painted it with enamel and sanded it. I screwed it to some melamine. I added clay radius and a coat of wax then pva. I sprayed the pva to heavy and it dried with a lot of air bubbles. I then laid 1.5 oz cs in all the radi. After two Coates of 1708 I waited for it to cure. Popped right off with no effort. The air bubbles did show up in the final part but it is very usable and will make a great anchor locker.
The reason I tried the anchor part first was to learn how to mold a deck with the same method but on a bigger scale. I already templated the deck and transferred it to a few sheets of melamine. I made all the hatch receivers out of 3/4 mdf. The middles are filled with 1/2” ply. I Ran a gutter along the transom with recesses for the scupper drains. I also made a1/8” disc to recess the fuel tank access cover.
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