manga face using cold porcelain, the same technique is valid for sugarpaste or airdry clay too
Cold porcelain: http://www.hobbyeart.eu/oc/Porcellana-Fredda-cold-porcelain/porcellana-fredda-e-paste/Porcellana-Fredda-Bianca-1Kg
http://www.hobbyeart.eu/oc/Porcellana-Fredda-cold-porcelain/porcellana-fredda-e-paste
http://www.hobbyeart.eu/oc