Making a Beautiful Impression Rachel Dein's method of plaster casting captures flowers and foliage in a unique and delicate way. She creates her original casts by making an impression in wet clay and then pouring plaster directly over it.
Vaseline and caulk to make small molds. For reproducing small details, coat the original with Vaseline, then cover it with a thick layer of 100 percent silicone sealant. Let it cure, remove the mold, and fill with plaster of paris.