That's the great thing about these molds or applicators is you can use the relatively inexpensive form of shotcrete spray on mortar or stucco then apply the desired design and have an expensive looking wall surface add a little extra time by air brushing colors on while the surface is still wet then later seal with a matte or satin weather & UV protect-ant and have a long lasting wall that you can be as proud of as one costing many 1000's of dollars more.