Sculpting With Polymer Clay : 8 Steps (with Pictures) - Instructables
Begin sanding with 300-400 grit sandpaper and go over the entire surface of the clay. Continue sanding with paper of gradually increasing grit density, all the way up to 1600. With dry sanding complete, start the process again with the 300-400 grit, but this time soak the paper in water first.
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