He blank was built up of several layers of Foam and then carved to shape. To build the blank, I used CFW epoxy because it does not chemically attack the foam. However, the hard glue lines at each layer of foam can cause difficulties when shaping the part.
Styrofoam has a density of about 2 pounds per cubic foot—very low. Unless the density of the glue line approximates the foam, the shaping process will remove foam much more quickly than the glue lines. This leaves unacceptable ridges at each joint in the foam. So to make shaping easier, I used epoxy thickened with 410 Microlight to glue the layers of Styrofoam together. Microlight has a very low density and does not make hard glue lines that other fillers might.