Plaster of Paris begins to harden in half an hour or less. ... Such damage usually must be repaired with a base coat and finish plaster, and mixing and applying these is difficult.

That said, using plaster of Paris to ensure a rock-free commode is a surefire "belt and suspenders" approach used by a master craftsman. You could do worse than follow this advice. Feb 4, 2006 ...

“Sometimes people think something is Venetian plaster, but it’s a glaze, a faux finish,” Layman says. “A lot of people think that Venetian plaster has a texture, because when you ...

Plaster of Paris is created by heating gypsum crystals, a soft mineral made of calcium sulphate dihydrate, to turn them into a dry powder. 13 October 2009 • 7:00am .