How to Finish Plaster Art Crafts

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Plaster casting is a great way to reproduce a high amount of detail in relief, but plaster itself is a fragile material prone to flaking, chipping and crumbling. Secure your completed plaster crafts by properly and securely finishing them with fixative, making them sturdy enough to last a long time and stand up to other decorating efforts.

Things You'll Need

  • Craft spray lacquer
  • Newspaper
  • Choose a fixative. For best results, buy a spray fixative rather than one that's meant to be applied with a paintbrush, especially if your project has delicate parts. Cast plaster is not as structurally firm as other projects requiring fixative.

  • Gently dust away any remaining plaster dust. Simply blow it away with your mouth or, if it proves more difficult to get rid of, use a hair dryer on a low setting or brush it away with a soft, dry paint brush.

  • Spray fixative. In a well-ventilated area, lay your craft project on a surface that won't be damaged by the spray, such as a layer of newspaper, and spray a single layer from at least six inches away. Spray from a consistent distance on all sides.

  • Allow fixative to dry fully. Drying times will vary according to brand, so check the can.

  • Turn your project over and spray the bottom. Let dry.

  • Add a second coat.

  • Apply lacquer or paint, if desired. Now that the plaster has been finished, you can paint or varnish it with craft brushes.

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