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The white/expanded/beadboard styrofoam can be used for scenery and so on, especially if you are going to cover it with plaster cloth or other type of hard sheel scenery. It can be cut cleanly with a hot wire cutter (ventilate!). However, you should probably not use it where any strength is required, such as subroadbed and/or tabletop. <br /> <br />You could go with L-girder type construction, with a frame and track on a plywood sub roadbed. This will allow you to have elevations below track (e.g. pit) and above (e.g. hopper dump track). You can fill in the resot of the landforms with the white styrofoam. Dave Frary has published articles on doing landscaping with "great Stuff" expanding foam and beadboard. <br /> <br />Andrew
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