This is my first time applying double exposure.
I did my work differently but the tutorials below would be a good reference of how it is done.
Photoshop: https://www.youtube.com/watch?v=6QBPZ8rjQhE
In-Camera: https://www.youtube.com/watch?v=Lcu8SdcsYnY
Photoshop: https://www.youtube.com/watch?v=6QBPZ8rjQhE
In-Camera: https://www.youtube.com/watch?v=Lcu8SdcsYnY