Yes I believe it was the epoxy that stuck to the plastic. I don't think this will be a concern for the other side though because now the hardened epoxy on the bottom won't really stick to it anymore. I still don't know exactly what the purpose is for using the glue gun on the joints before the fiberglass job.

: Was the plywood hard to peel off the plastic because of epoxy? If so, run up
: to the kitchen and grab the wax paper. Epoxy will not stick to it.