As I said before in my previous posts... I didn't make it myself, I had it commissioned.
I can't sculpt for shi !
The Apoxi isn't flexible at all. It'd crack if I tried to move it.
I'd advise casting it in silicone if you're looking for flexibility.
As for the paint. Use Acrylic paints. Enamel paint can "eat" the figure.
No sanding or wash coat was used, however, I do recommend washing it with soap water before you start.