Your rocks look great. You can come over and paint mine anyday. I went to a building supply(not Home Depot or Lowe's) and asked for some Hydrocal Plaster. They sold me a 50 lbs bag for about &11.00. The stuff dries rock hard in about five minutes. I found that if I mix it a little wet it pours into the molds easy and dries hard. The wet stuff is a little more fragile and lighter. You can take the mold and press it against a wall and hold it there for a couple minutes, then peal off the rubber mold and the casting will stick and form to the surface.
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