i am a novice, i have just made my second rock, i used the brown stucco mix, quikrete, i am sure that this is fine for nonstructural rocks for accent pieces. i have found that the workability is ok. once i start getting better, i will try a small structural waterfall. so for the question, if i build the skeleton as you say with the rebar, lathe and chicken wire will the stucco mix be ok. the only reason i ask is due to the inability to find some of the materials for your cement mixture. if not stucco what other premade mixes will be suitable. the brown coat stucco is conveinent, just add water and it is already brown in color. thanks for your comments and suggestions,