- 1). Fill a spray bottle with warm water and add in 1 teaspoon of liquid dish soap.
- 2). Spray the inside of a rock wall mold using the soapy water.
- 3). Pour 1 cup of powdered plaster of Paris into a measuring cup and add in 1 cup of warm water. Mix well with a spoon.
- 4). Pour the plaster of Paris into the prepared mold and allow the plaster to set for about 1 hour.
- 5). Pop out the fake rock wall mold and place it onto a flat surface.
- 6). Paint the wall using gray textured paint. Let the paint dry.
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