I've been experimenting with various light-weight, air-drying clays like Craft Porcelain and Crayola's Model Magic.
So far I've had the best luck with Model Magic...it's very light but as I made mine too thin it's not very strong. Live and learn..

I have a mask-making community on DeviantArt: Mask-Making-Artisans.deviantart.com and one of my members has used Craft Porcelain to make a VERY detailed mask which included small hand-sculpted clay feathers. I've asked some questions about this medium but have begun to feel as though I'm "stepping on their toes"..so I'm turning here for help.

I have a sculpted mask base which I use to cast my paper masks over top of, but now I'm using it for the air-dry clay. I've currently got a half-faced mask, created from the Craft Porcelain, drying on top of it. The clay hasn't adhered to itself as I thought it would. I warmed up the clay first by balling up small amounts in my hand and kneading it repeatedly before using it. To make the mask I added several pieces of the clay to eachother in sections...as it's drying some of the clay sections are coming apart...or 'peeling up'...not sure if it's supposed to do this or not...?

Any and all help or suggestions would be greatly appreciated.
-Thanks!:)

~Sphinx