The only issue I see is that your going for a cave look, which means people would be walking through it. Human nature shows that if someone walks through a cave and sees the rock they are going to touch it, which means they are going to damage something that isn't made to be touched and played with.
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Mostly I wanted to avoid foam as it is flammable. I guess I'll try a small section and see what happens. As far as kids touching it we just cut off the hands of the first one and the word gets around! 
eh, just don't catch it on fire and problem solved. I think the foil would work out if you messed with it enough. then you could paint it with textured paint. i used old wood pellets that had gotten wet and turned to saw dust and mixed it in the primer for my stone pillars and it worked great. you could also use sand as well maybe even some of the chunkier sand. Now you have me curious, think ill experiment with some foil and paint to see what i could come up with.
I think the foil would work out if you messed with it enough. then you could paint it with textured paint. i used old wood pellets that had gotten wet and turned to saw dust and mixed it in the primer for my stone pillars and it worked great. you could also use sand as well maybe even some of the chunkier sand. Now you have me curious, think ill experiment with some foil and paint to see what i could come up with. 1 - 9 of 9 Posts
