Foam casting revisited

[Troy]

I am revisiting this again. I am wanting to make large cartoon sculptures to display in a children's building. I could sculpt them out of foam but my foam skills are not yet where I would like them. So the thought came to me to sculpt the detailed parts, head, hands out of wed clay and then cast them in alginate, then make a eps copy to be fiberglassed. I have figured out the hard coat part. Looking for input on the molding in alginate and casting in eps. I realize I will need a mother mold to keep the alginate molds shape. Release agents for eps and alginate?
Thanks for any input.
Troy

[Arrow]

Perhaps strospray is the material your looking for. If you get the demo video on strospray you can see how versatile the spray can be.

But I don't know how well the urethane resin will setup against a waterbased alginate mold, unless it was sealed somehow.

The owners are good people to deal with, they could tell you.

http://www.industrialpolymers.com/styrospray.html

http://www.mooseworks-3d.com/index2.htm

Just a thought. I dislike polyester fiberglass resins soooo much, melts all sorts of surfaces :(