Boston piece I did last year) and I really LOVE how they look. I love the 3D quality of the piece and the added opportunities it allows me for personalization and texture. I won't go into great detail, but I first saw this method on a blog by one of my very favorite artists, J. Kirk Richards. You can see the video here.
1. First, I sketch out what I'd like it to say, and then I cut it all out with an Xacto knife.
2. Then I adhere the paper to the board. Usually I use clear acrylic matte medium, but I ran out, so I just used regular acrylic paint. It doesn't give me the initial depth I get with the matte medium, but it was okay for this project.
3. Then I add depth to the painting with layers of paint in different colors. For this piece, I used all really pale, neutral colors.
4. Add some gold leaf. Maybe a little too much gold leaf...
5. Cut back on the gold leafing and add some more layers, and I'm done!