Thanks Scott.
Yea, the 568 is the PMA. I already do what you suggested about the foam backing. My real problem is the "orange peel" effect that is showing up after mounting. I can't do hinge or tape mounting because the paper will wrinkle in the frame at the shows. I double mat, and can't seem to find the right substrate/adhesive that doesn't cause the effect!
Anybody ever solve this???