Well taking the advice of Ty for doing the ground I had planned to use his homemade Sculptamold and then grout. He uses hydracal and cellulose insulation for the sculptamold. and then instead of zip texture (hydracal and powder paint) he suggested going over the sculptamold with grout. Colored grout is expensive so he suggested going to the local restore. Well that turned out to be bonanza. I found a full bag of a nice earth brown grout and a 1/4 full bag of a dark brown grout similar in color to the color I painted the rock wall. I also found a 3/4 full bag of cellulose insulation. Total cost $4.85.
Tomorrow I will experiment. I donāt have any hydracal and donāt want to buy just a small batch. 5#s in the hobby market is like $15 bucks. Ty put me onto a place in Spokane that can sell be 50# for $30.00 kinda a no brainer. So my experiment will be to use regular plaster which I have. If I donāt like the results I will buy the 50#s. I will need about a bucks worth.