Slide 3D model in diferent pieces

I will provide a 3D model design for 3D print. The model is of a snowman. some parts (hands, base) are already separate pieces but I need the main body to be sliced up. but not simple plain cuts. From the body extract as separate pieces: 1. extract hat as separate piece. bonus points if you can make the head round (under the hat) and the hat fit the round head 2. extract nose and eyes as separate pieces (so that they can be printed in different colors). eyes should have eye socket to fit (glue) into. nose will be a pin-to-hole like the current arms 3. scarf with scarf knot as separate piece. if possible make the scarf like a doughnut: puffy round edge with empty center. this will it so the scarf can rotate around the body when the pieces are assembled .. in the center hole of the scarf the head pieces connects to the lower body so: 4. separate upper (head) from lower body. these to pieces connect under the scarf and the connection can be flat as they will be fitted together using magnets I will add an extra tip for a very good job and if you can make the surfaces smoother and better for 3D printer