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How to Make Fake Rock Walls With Plaster of Paris

Updated February 21, 2017

If you are making a model for a school project or a train set, you can make the model look more appealing and beautiful by adding on walls that looks like real rocks. You can make a fake rock wall with a few materials that can be found at a craft supply store, such as plaster of Paris and textured paint. Once finished, you can place the rock walls into your model to make it look more realistic.

Fill a spray bottle with warm water and add in 1 teaspoon of liquid dish soap.

Spray the inside of a rock wall mould using the soapy water.

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.

Pour the plaster of Paris into the prepared mould and allow the plaster to set for about 1 hour.

Pop out the fake rock wall mould and place it onto a flat surface.

Paint the wall using grey textured paint. Let the paint dry.

Things You'll Need

  • Spray bottle
  • Liquid dish soap
  • Rock wall mould
  • Plaster of Paris
  • Measuring cup
  • Textured paint
  • Paintbrush
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