Help please! I have used a balsa cowl as a plug to make a female mold. It has been two days and the plaster of paris mold is still damp. How long does it take for the mold to dry? Also, is there anything I can do to make the mold harder? It seems very soft and crumbly in its present state. Is there anything I can spray or brush in the cavity to make it harder or stronger. Any suggestions would be appreciated. Thanks Duke
- posted
19 years ago