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HO Scale C & O Railway Engine Yard Laborers' House at Hinton, West Virginia. Structure No. 31 on the Hinton Fire Prevention Map (1930). See http://hinton.cohs.org/dwg/Engine_Yard_Laborer_Shanty.pdf. Walls are 1.75 Scale Inches thick and you expect that styrene or other backing will be required to correct the warping of the walls caused by the heating to remove the wax substrate.