Here are some basic shapes I am working on with paper clay. It has been relatively easy to work with, and fairly easy to smooth. One of the biggest things to remember is to let it dry a little before you work on smoothing out the surface. Kind of like giving it a hard crust and then you can use a damp cloth which acts like sanding.. except it actually fills in the low spots. this is a really nice perk of paper clay. Some people call it cold porcelain, and I can see why. It does look a lot like cured porcelain when it is dry.
It is also a pretty strong material as far as that goes.
My next experiment with it is to paint it onto a surface and see how that works out.