01-16-2011, 10:08 AM
I think that one of the by products of burning poly urethane is cyanide. You won't deliberately burn it, but in case of a fire, I wouldn't want it in my house. One trick that you could use to get land forms with ditches or gullies or other scenery below the roadbed would be to pick up a luan door skin if your modeling in n-scale, or a thicker plywood if you are modeling in ho and make a "cookie cutter" layout the same size as the door. The cut some wood to make risers as needed to raise the layout above the door. Run your wiring and any switch mechanisms as needed and then use plaster and screen wire or whatever your choice for a surface material to make your land forms.