I had trouble with Super Sculpey breakage. A dollmaker I took a class from suggested 50-50 mixing with Cernit and that seemed to be much better.
I've got some of the Bake-and-Bend Sculpey - they quit selling it in open stock where you could just buy flesh tones of beige or brown etc. But I did e-mail the company and also got the suggestion to mix it with regular Sculpey. Haven't tried yet but glad to know it's possible.













For the ears are you making them separately then stitching them to the heads? If not, that might help. If you already are, maybe leave the ears open and hand-sew them after you turn the head right side out?
I might cut it down one of these days and tack it to her head with some kind of removable tape - that way if it rots too, it can be replaced again. 
One is an early Springfield doll, and the other I got at a garage sale or thrift shop so I don't know what she is but she's not an American Girl, that much I can tell.

). Are there some that have variable speeds to give a scaredy-cat more control?








