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  • How robust is plaster of paris? I want to make a thing to go on a wall. Art, if you will.

    Will it crumble as soon as anyone looks at it?

  • How robust is plaster of paris?

    Pretty stout if you do it well. Many a plaster wall plaque has survived for decades. Build it up in layers if it's going to be thick, and add fabric (plaster gauze) as a fibre reinforcement in any areas where you're not bothered about a fine surface finish

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