"Martin H. Eastburn" wrote: (clip) Think grape press. (clip)
If you could find a grape press, I doubt that it would get all the excess
oil out. Remember that foundry sand grains wedge against each other to form
sort of a porous solid--that's what makes it into a mold. Do you know how
much excess oil you put in? I suggest you buy some more dry sand, and blend
it with the stuff you have to produce a usable proportion. If that would be
too big a batch, just use part of your wet sand at a time, until you have
eventually worked it down.