i have a customer ask about finishing an outdoor kitchen consisting of a 20 gauge steel frame. They were initially going with hardi backer and a tile/ veneer stone. That is until their "minds were blown" by the possibilities of vert carving. My question is.....what is the best way to go about applying the vert to the steel frame? Dura rock? Hardi backer? Metal lathe? Spider lathe? It has to be st…