How to smooth the surface when sculpting with air-dry ...
2. Sanding. No matter how much you try to smooth out the clay when it's wet, sanding is inevitable. For that, you'll need an assortment of different sanding papers, from coarse to very smooth ones.When shopping for sandpaper, you'll see numbers such as 60-grit, 120-grit, or 200-grit (in some countries the grit numbers might vary, so pay attention not only to numbers but to the sandpaper itself).