Re: Mold release + EG + vibration => problems?
I have done a few molds using mdf with only wax.
These released very well but I have only done smaller parts, that are not cast but molded in to place using drier mixes.
But I think that the aggregate moving wax around on the surface may be a good point and I think it might be less of a problem with mdf as that will get slightly impregnated with the wax.
Another thing I think might be overlooked is the stiffness of the mold material. The stiffer it is, the more difficult it will release because it is harder to peel.
Here mdf may also have an advantage is it is permeable to air.
Sven
http://www.puresven.com/?q=building-cnc-router