EDIT: For those asking on Pip's account about putting the papermache into the oven, it should be noted that paper burns at 450 degrees. I put the mask, with the papercmahe, into the oven at 270 degrees. I assure you that it will not catch fire if you wish to do this yourself. I left the mask in the oven for ten minutes (enough for it to harden) and then removed it. No fire, no burned edges, or any type of damage was done. Just because it's paper does not mean it will immediately burst into flame the moment it touches any amount of heat; that's a silly assumption.
The first photo is the base. So that the sculpey would hold its shape I made a papermache positive out of my fiancee's face. I then reinforced the inside using cardboard strips and hot glue. I then smoothed sculpey on top of the papermache mask and smoothed it out as best as possible using cotton balls and 90% rubbing alcohol.
It was then cooked in the oven at 275 for 15 minutes. After I removed the mask from the oven, several minutes was allowed for the mask to cool enough to handle. The hot glue rig, on the inside, was melted, thus making the removing of the papermache easy. The mask was then smoothed and sanded to a fine finish.
After a period of two days, and filling in cracks and holes with sculpey and bondo, gray primer was used to make the imperfections more visible. At this point in time there was a lot of sanding and filling just to make sure everything was a perfectly smooth as I could manage.
After the final priming the mask was hand painted to give it a handcrafted, porcelain look.