I used about half a loo-roll to a 300mm cube of very soft/wet school clay. I rolled the clay out to about 2cm thickness, added strips of loo-roll, rolled again and wedged - and repeated - until I had a good consistency and the paper was no longer obviously visible. Then I used like normal school clay.
After making my basic hollow-shapes, I joined them and skewered them onto place, using thin sticks and some saved polystyrene packaging (see photo below). What a brilliant method - it stayed so strong while I added heads.
When the model was leather-hard, I removed the sticks and transferred the model to a board. The holes left by the sticks were easy to plug with soft clay. Now, fingers-crossed it makes it through a kiln-firing.
|model skewered into polystyrene with sticks
|sticks removed and holes filled in, final decoration added