> I discovered we have one portable plaster filled table, about 20" by 40" to > wedge clay on, but the plaster is all cracked, and chips come out in the > clay. I've never done this before, but should I break up all the plaster, > empty the frame out and attempt to mix up and fill it with new plaster? IF > so, I'd appreciate some advice on that! Is this a special kind of plaster?
I'd chip out all the old plaster. It's not that hard to do and then you can
start with a freshly poured block.
You will probably want to use Pottery Plaster Number 1 or combination of
Pottery Plaster Number 1 and a harder plaster like Hydrocal or Ultracal in
the table for your wedging surface.