A STENCIL of BULDERS FORM Is Very Unusual. To uce it, you NEED A Milder consistency of the Solution. A STENCIL IS Applied to the Plastered Surface and Pressed Slightly, The You Shoup Wait Until the Solutions Hardined, But Without the Solution and Carefully Ve. The Embossed Pattern of Large Boulders Remains. SUCH STENCILS ARE MADE of Soft Rubber or Even Silicone.