> I'm having a heck of a time taking a fiberglass csting off of a plaster
> plug. I've tried a layer of primer, two layers of PVA mold release with a
> layer of paste wax for good measure and still get too much bonding. In an
> earlier thread someone mentioned a mix of vegetable oil and soap. Is there
> any other way? Frankly I've not any patience left for another failure.
> There's got to be an easier way! People do this every day. What's the
> secret?

Some ideas:

Break the plaster. It will leave a mess.

Or try covering it with saran wrap or other thin plastic sheet. after the resin cures, break the plaster and it will be mostly captured in the plastic wrap.

A more flexible mold (or tha saran wrap) can be peeled back, breaking the bond between it and the resin.

Some people blast air between the mold and the molded object, `Popping' it out of the mold.

Hope something here will work for you.

Paul G. Jacobson