fiberglass mold with fiberglass casting

[jerrystaxidermyhunter]

               i am making a fiberglass mold of a tree mushroom and want to cast with fiberglass what should i
               use for a release .

[NOAH@aarrkk]

For casting fish I use a couple coats of wax, buffed in between coats.  After a nice shine is obtained, I spray on a coat or two of PVA and the cast comes out just fine.  I'd assume on your project you made a two piece mold so getting the cast out should work fine too.

[jerrystaxidermyhunter]

          thanks yes it is a two piece mold.

[lizardrib]

Just get some polyester parafilm from WASCO. It is on page 202. I make bondo/resin cast from bondo/ resin molds.
You only need one coat and you are set, no multiple coats, waxing ,buffing or waiting!

[John C]

I seal the mold with lacquer, then once its dry, JOHNSONS PASTE WAX. this is available at your local hardware strore. Its pure wax without acids,  give it a coat allow it to dry then buff it out, repeat two or three times and parts will pop out of the mold. Just  wax and buff each time you pull a part.

I feel after using PVA you loose some detail.

[jerrystaxidermyhunter]

                   thanks i will try both ways and see which one works best for me.

[newbirdman]

Why dont you just make a mold with latex or rubber ?  Then you can do a one piece mold. Rick

[jerrystaxidermyhunter]

                        done made the mold and it turned out great .