Good Afternoon Chris;
I think the answer will be one of 'it depends' (as it often is)...
When composite model sailplane pilots suffer a skin delamination, they will often simply drill a series of closely spaced holes in the skin, and then inject foam-safe CA into the holes, pressing the skin into place (if necessary) until the CA kicks off.
While you could likely do that right through the monokote, you may have better luck stripping off the covering at a minimum.
r/
Dave