Last month we framed a sheepskin from 1965. It had been rolled up since then so, carefully, I unrolled it and pressed it between weights for a few days It flatened perfectly (even I was surprized. Double mat UV glass acid free back with pressure plate. Looked great. Customer Impressed. One week later....she's back with it. It looks like a 3D relief map. I've NEVER seen anything like this. I've only ever done a half dozen sheepsins and never had this happen. So far I've been told that the only solution is to drymount, I don't like that. Exactly how durable is this stuff, can I wet it on the back and use my press to dry it? I'm worried that unlike paper this might make it worse. Any ideas?