A sound ninja can solve konohas problem
So, its fairly evident that them piercings are the way nagato controls them guys like advanced puppetry from my previous thread, and that the rinnegan may be like a wave, and is sending out high frequency chakra and this material responds to that particular chakra.
Well in theory then this material could be shattered like glass with sound ninjas abilities, or narutos wind element could get through them, but hes stuck on that mountain i cant be bothered to spell lol.
But yeah, itd be cool if a sound ninja came from nowhere and managed to use soundwaves to interfere with the rinnegan waves, or use such high pitched sound it shatters the material.
I doubt a sound ninja will actually appear and do this, but it seems sound attacks are possibly very useful for this particular situation