Paint the wood with the gray paint, using a foam brush. Don't worry about priming, this will help with the rustic look.
Next, use another foam brush and brush on some darker gray.
Once the gray paints are dry, thin some white paint down and brush on one coat. This softens the edges of the dark gray but it will still show through.
Using a ruler, line up one of your hooks in the middle, use a pencil to mark where the screws should go. Then measure evenly on either side for the other two hooks. Use a hammer and a finishing nail to make a small indention to make it easier for the screws to be drilled in.
The screws on these hooks are so small I couldn't use the drill, the finishing nail makes just enough of an indention that I can hand screw the hooks in. Use a drill if your screws are big enough.
I had originally planned to use picture hanging hooks on the back but my husband decided it would be best to just screw the coat hook straight into the wall, into the studs. He said it would be much more stable and secure that way. The weight of your wood and what you will be using this for should determine if you screw yours in the wall directly or use picture hangers on the back.