Sculpty question

I got some sculpty the other day and am using it to make a master so that I can form metal parts over it (an idea I got from FSM issue somthing-or-other). My question is should it be rock soild after baking? I swear I followed the directions but, it seems a little “soft”. Also the metal I am using is a Pewter embosing materiel medium weight (it was all I could find at the craft store) is there anything better?

Grizz

Right out of the oven it will be a little soft. It takes a couple days before it reaches its max hard state. Nonetheless, it won’t be rock hard like other mediums. Milliput gets a little hard (more easier to sand). Aves Apoxie Sculpt is better I hear. I just ordered some from Starshipmodeler.com

http://www.starshipmodeler.com/cfstore/index.cfm?fuseaction=product.display&Product_ID=162

Thanks for the info

Grizz