ya, they took the uv protectant out of monokote. so even the extra on roles in my workshop goes bad (the color layer and the Mylar fracture together or separately). my ultra sport 60 (maddened in 1986) was recovered in 2005 needs another recover. but the last flight of my us60 it lost pieces, I landed and found three wing bays shattered. its mostly stripped now the metal flake blue from 2005 came off well, but the original yellow is coming off in little shards, any amount of bending and it shatters like glass.
also had a lot of luck removing old color layer that sticks to wood with a razor plain.
joe