Garden Steps

Builder's Foam 2" thickness
Black & White Gesso
X-Acto Saw
X-Acto Knife
Ceramcoat Quaker Grey paint
Small piece of dense foam
Ground Foam .... AMSI
White Glue
 Hair Dryer

Cutting the foam is best done with a saw to create a rough texture.  Saw slowly otherwise the foam may tear.  An X-Acto knife carves and creates the rock shapes and layers.  I have not found a good use for the smooth sides other than the bottom of objects created with "BuFoam".

Mix Black & White Gesso to desired shade of dark grey and with a stiff brush apply.

For quick drying fasten steps with pins to a larger section of foam, or you will be chasing wet steps once the stream of hot air from the hair dryer hits !

Quaker Grey Acrylic paint by Ceramcoat is dabbed on steps using a small amount of paint, allowing the darker Gesso grey to show through.  For this a dense sponge is best.  I have found them to be pink in color versus the black or yellow sponge.

Direct any clear drying white glue into the areas you wish moss and drop generous pinches of ground foam and I believe it is by AMSI.  Seems I didn't save the packaging once I dumped the very fine foam into a more suitable container.  Tap off excess foam back into the container.

The final step is to admire your rock creation.