When sculpting with foam board it is necessary to peal off one of the paper sides in order to expose the foam.
To sculpt the bricks I used an exact knife and tooth pick. A press mold is a better way to accomplish this. I normally take an old paint brush and pull out the bristles. The metal tip can then be bent into a nice rectangle shape and used as a mold.
To get a nice smooth finish I put on a little modeling paste. My paste had dried out so it was not ideal. Again, take time doing this.
A quick sanding of the bricks and plasterwork provides a relatively nice surface to paint.
I used three colors of paint for the bricks. The goal was to provide a nice top coat on the plaster. You can see how my sloppy brick work really shows through!
The fun step involves loading up the model with Secret Weapon Miniatures white weathering powder. I haven't had a use for this color before.
After working the powder in with a brush I licked my finger and used it to rub away the powder on the bricks. The weathering powder tastes terrible by the way.