Forgot; depending on the size of your plaster pieces the drying time will vary , some of the larger one : cone 8 inches in bottom 3 inches at the top and 18 inches tall will take a week to dry before shellac, an HHG may take a day or two depending how hot the environement. this may be the only draw back with the plaster, you can demold them rather quickly (much quicker than resin), but it will stay moist for a while, but the results in the quality of the energies is worth the wait 