Just looking this over again and I have questions. After you put the plaster cloth down do you then spread the rock surface plaster on top and press the foil down to create the texture or do you spread the plaster on the foil to get the texture and then press it against the plaster cloth surface? Does it even matter?
Also, do you need any slippery (release agent) chemical, such as vaseline, on the foil to make sure it separates or does it peel away easily?
It really looks excellent and never the same!