I’ve done this, two coats of acrylic worked for me. I have both black and white gesso but I didn’t use any. Bone takes the color really well.
Metallic blue mix on a racoon skull:
I’ve done this, two coats of acrylic worked for me. I have both black and white gesso but I didn’t use any. Bone takes the color really well.
Metallic blue mix on a racoon skull: