I don't know, but I can't believe that its any good for it. Don't get me wrong, I don't imagine it'll destroy it, but if the art is that worn, then everything possible should be done to preserve it as much as possible so it can be recorded before its (inevitably), destroyed. Recording it requires a lot more than urine, so why bother with that part of the process when it has so many other negative aspects? Like I said, if it was beneficial then ok, but I don't see any tangible benefits.