I have used the plain old zoopoxy before, never the sculpting one though. What kind of paint would you use? Thanks!They are using an epoxy putty. you can do the suggested method above but its a real pain with trying to get the foam to stick to the PVC and bla bla. Here is the epoxy putty, its like using clay but will become rock hard when its cured and you can do anything you want with it, bark texture, rock texture, mushrooms, vines etc etc.
her is one link
Plasti-Paste® II Trowelable Plastic Product Information | Smooth-On
Sculpturing Zoopoxies - POLYGEM, Inc.
its almost fool proof, the only hard part is painting. if you can paint then your set, if not then....get learning.