http://www.dakkadakka.com/dakkaforum/posts/list/8.page JForum - http://www.jforum.net
The mold turned out ok, but the sculpey stuck to both it, and the pieces reeeeeally badly, even with a mold release applied.

A) What sort of clay do you guys use when pouring the first half of your molds?

B) Anyone know what can get sculpey off plastic without ruining it? This stuff is insanely sticky. ]]> http://www.dakkadakka.com/dakkaforum/posts/preList/593188/6790148.page http://www.dakkadakka.com/dakkaforum/posts/preList/593188/6790148.page GMT
Unfortunately, I don't know what could help remove your current mess.]]> http://www.dakkadakka.com/dakkaforum/posts/preList/593188/6790770.page http://www.dakkadakka.com/dakkaforum/posts/preList/593188/6790770.page GMT
Some other folks have recommended rubbing alcohol, I'll give it a go and report back this evening. : )]]> http://www.dakkadakka.com/dakkaforum/posts/preList/593188/6791834.page http://www.dakkadakka.com/dakkaforum/posts/preList/593188/6791834.page GMT

PS HOW AWESOME IS SUPER SCULPEY ]]> http://www.dakkadakka.com/dakkaforum/posts/preList/593188/6792099.page http://www.dakkadakka.com/dakkaforum/posts/preList/593188/6792099.page GMT
Sculpy is not normally sticky, so it seems that you are having an interaction between the Sculpy and possibly the mold release or more likely your silicone. The plasticizers from the silicone may have leached into the Sculpey or they are interacting in some way causing the stickiness.

You may find that the effort to attempt to fix the issue would be better spent on a new mold with modeling clay. Usually these interactions are best cured with time. Set it to the side and leave it for a week or three. The chemicals settle down and have a chance to outgas some.]]> http://www.dakkadakka.com/dakkaforum/posts/preList/593188/6792158.page http://www.dakkadakka.com/dakkaforum/posts/preList/593188/6792158.page GMT
Is the stickiness a sort of residue or are you just having a hard time getting all of the clay off? I initially assumed the latter case (in which case cooling the piece may help firm the clay up a bit, which could make things easier), but Sean reminded me that the stuff does actually react with some materials. I had a brick that my wife wrapped in cling film, which developed an odd, almost greasy slime on the surface of the clay and softened the plastic. If the clay went funky, my money is on a reaction with the mold release.]]> http://www.dakkadakka.com/dakkaforum/posts/preList/593188/6792192.page http://www.dakkadakka.com/dakkaforum/posts/preList/593188/6792192.page GMT

Turns out rubbing alcohol kinda works. It doesnt remove it like a thinner, it just kinda dries it out so it's more crumbly and can be chipped off instead of smearing all over the place. Still decidedly not easy, and very much not recommended.]]> http://www.dakkadakka.com/dakkaforum/posts/preList/593188/6792391.page http://www.dakkadakka.com/dakkaforum/posts/preList/593188/6792391.page GMT