To see your character in 3D is fantastic. You only need some silver foil & clay for example fimo from staedtler wich i used.

2. try to sculprure  as much body as possible from foil, so you need less clay

it dry faster and doesnt get so heavy.

4. The litttle details like the box i add when it already was a bit more try. With sandpaper and a knife you can work at this stage.

1. Sculpt a skeleton made of silver foil.

Make sure it stands well.

3. Add the clay in large pieces. 

With water you can make the sureface more smooth.

5. Color it :) If you uses a dark clay its usefull first add a layer of white so you make the colors cover brightly and it also fill little holes in case there are some.