To begin casting the stone, clean the mould with lukewarm water to get all “extra” particles off the surface. The glue can be washed when it has dried thoroughly. Dry the mould carefully before covering the mould with peeling agent. The agent is made of 6 parts lacquer petroleum and 4 parts white Vaseline. Mix the ingredients so that it’s a bit thinner than sour milk. It’s easier to stroke the agent to the surface if you turn the mould inside out.