The protest would be lodged since epoxy isn't a suitable material for use in the hull construction. However, carefully reading the 2013 F18 class rules (http://www.f18-international.org/index.php?option=com_phocadownload&view=file&id=51:updated-2013-class-rules&Itemid=50) I think I am fine:

"D.3 HULL SHELLS
D.3.1 MATERIALS
(a) The hull shells shall be built from polyester or vinylester resin, glass
fibres, polyester gel coat, the combination of wood-epoxy or injected
plastic with a core of PVC or balsa or felt. The hull shells shall not be
altered, other than locally for fittings and passage of equipment and normal
reinforcement. Epoxy glue is permitted for joining components. Every
material that is not expressly permitted is prohibited."

The "epoxy glue is permitted for joining components" statement may apply here. Furthermore I couldn't find anything that states the beams must be removable but there is probably another rulebook that says otherwise.