The formula I found worked best was 2 parts portland cement, 1 part water, 1 part polymer fluid. This fluid can be bought from "Something Better Corporation" online. They also have some videos on youtube showing how this is mixed and applied. I added 2oz of 1" fiberglass shreds to the mix. I used a 5-gallon bucket and a heavy-duty drill mixer. The concrete was applied with a trowel just like stucco application. For the texture, I used silicone bark rollers and clay sculpting tools for the smaller details.