Builder had never made an attempt to build covers for the external vents for the engine rooms. They have simply been covered by plywood and removed when the boat was moved. Calculations were made to provide a total opening area equal to the full opening and a plug was made from wood.
All imperfections were filled and the plug painted, waxed, and coated with a mold release.
Molds were then produced using a two-part epoxy mold product.
Release was far from ideal, but accomplished to find out that the heat from the epoxy had caused moisture to release vapor from the wood and produce a lot of small bubbles on the mold. They will require a lot of additional work to create usable molds for fiberglass vents.
