www.primacoustic.com/broadway-panels/Have an interesting twist on the standard wood frame construction.
They reinforce the OC703 edges by applying a thick coat of glue.
Thinking 3 perimeter coats of epoxy applied with a roller. Soak the corners?
I'm a woodworker first so I have never tried this technique.
Also like their idea of cheese cloth? / 3M 77 spray adhesive containment cover.
Shawn