I then, from my drawing, cut out one layer at a time of the wings to use as a stencil and using a putty knife applied putty or drywall mud. You can see my layers of putty on the photo.
When that dried I painted the wings black. I then lightly painted white with a downward stroke to leave the details of the putty feathers. The bottom feathers I used a screwdriver to scrape lines in the white paint exposing the black underneath. I love how they turned out. It was also super easy.