Making Walls and Abutments out of Foamcore
Foamcore can be used to make inexpensive stonework for walls and abutments.
Here are some slabs that will eventually make up the abutment supporting an overpass for
an EBT extension in Sn3. They were scored by a dried up ballpoint pen. A straightedge was
used for the horizontal scorings and freehand for the vertical scorings. The parts were
displayed on a convex surface. The foamcore itself was not warped.
Next, a layer of gray was painted on the parts to provide a base color for the stonework. The
colors used were black, white and yellow ochre. I use acrylics from a tube or bottle. I mixed
black and white with a small amount of yellow ochre to get the basic grey color.
Next comes the detail colors for the stones. It's best to select a brush that is approximately the
width of one stone. Put a small amount of paint on the brush so you can lightly dab the stones and
get a grained effect. Acrylics dry fast and if you get too much on a stone, you can go back to the
gray and paint over it and when it dries, try again. The foamcore parts in the illustration above have
been touched up with black paint.  
Then we used some white paint to dab in some more detail color and then used yellow ochre for a few
of the stones.
Here is the wood used for the insides of the abutments. Notice that some foamcore was used to
shim up the above abutment.
We are now ready to construct the abutment.
The abutments now have the parts  white-glued together. The notch is to accommodate a plate
girder bridge.
The plate girder bridge has been put into place along with the Sn3 flex track and HO cork roadbed.
Here is our bridge in the place it will occupy on the Penn Western.