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Foam over plywood isn't going to be a practical option for me in doing the scenery on my layout, so I was wondering a few things about plaster of paris. How thick can it be applied without any sort of form underneath to make small hills, culverts, ditches, etc? Is the best (most practical) method for making mountains with plaster of paris using plaster dipped shop towels over wire mesh? Hydrocal isnt' readily available in large quantities in my area, but plaster of paris is, and is also much cheaper. Is there another alternative to plaster of paris (that can be found at home improvement centers) that would work better as a basis for scenery? How long does plaster cast hills and mountains usually last without crumbling or causing future problems with the scenery? Weight isn't an issue with my layout, but I was wondering... does 20lbs of dry powdered plaster equal 20 lbs of set up plaster after it's applied to the layout? Thanks for the help guys!
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