I have never mounted the Moab paper, but have dry mounted plenty of glossy papers with either Fusion or Ragmount on standard foam core.
The Acid Free foam core may also just a bit better for this as it tends to have less dimpling than the clay surface.
Beinfang makes both Fusion and Ragmount. Ragmount is a thicker material but always has mounted perfectly for me. You also may need to back off the suction pressure on your press as that may also be part of the problem.
Fusion supposedly is removable with heat, ragmount is a one time deal and once down is an excellent mount.
Paul