Model Railroad Scenery: Modeling Realistic Rock With Spray Insulation Foam!!!

Step by step process on how I use spray foam insulation to create realistic rock work on my Little Gunpowder Mining & Excavation Module!! You will need: Great Stuff Spray Insulation Foam Number 2 hobby knife Latex gloves "Folk Art" Home Decor white, Chalk Paint Apple Barrel or equivalent tans, grey and siennas Stiff bristle brush Cheap mixing bowl