Ebay: Customized pet magnets!

Greetings, I'm an artist who usually does 2d, with occasional forays into 3D.
I first discovered Cernit years ago, and recently got back into this after I
discovered SuperElasticlay moldmaking compound! I like the surface look you
can get when you press different colors into the mold. Here's my Ebay listing
(I'll probably add dogs later on...):

http://cgi.ebay.com/ws/eBayISAPI.dll...tegory=20 644

I've also found that the Granitex and metallic colors work well when trying to
simulate fur and color in animal figurines. They also have a nice stone-like
texture.

Small question: what's the best way to create a mold of larger objects so as
to minimize distortion? First make an original out of Sculpey and bake it. I
tried putting the mold in the freezer so it would stiffen the Elasticlay, but
it still distorted a bit as I pulled the original out. Another time I tried
baking the mold with the original still inside. The mold came out nice, but
the original was damaged. I've heard people mention Armor-All... is that
superior to talcum powder?