What you describe is performed regularly with various materials. Babbit bearings for instance. I assume you've noted this visually on the edges, and are concerned about the rest of it. The ideal set up is as already mentioned, but to add to it, they can calc out the expected reflection co-efficient which should give you a pretty good idea if it's bonded or not, which in turn should give a good starting part for judging the validity of your mockup.