Can anyone give me advice on what is a good clay for sculpting that doesnt dry out at room temp? I went to school for ceramics, but the clay I used was for drying out, and firing in a kiln. I have seen some room temp. clays out there, but was hoping to get some feedback on what brands/kinds work best. I am interested in doing some sculpts, and then possibly get into vacuum forming, or mold making. Ultimately I would like to make a custom helmet and armor set, maybe some masks, etc... I appreciate any info. I did see the thread about where to get supplies, but what is good for what I intend to do?