Now that you have finished mounting your mosaic on the mesh, it is time to turn it over to remove the wax/parchment paper. If it is a large project you will need help. You might have the urge to cut any large project into sections now, don't. It is much easier after you have turned it over, removed the wax/parchment paper, and then use a box cutter to cut through the mesh.
It is very important to remove ALL of the wax/parchment paper. Note the little beads that are left behind when I use the glue gun. This allows maximum seepage of the thinset through the mesh.