1. Fill the background with black.
2. Filter/Render/Clouds.
3. Filter/Render/Difference Clouds.
4. Press Ctrl+F to repeat step 3.
5. Duplicate layer.
6. Change top layer to screen and Filter/Artistic/Plastic Wrap…20/15/15.
7. Change back to bottom layer and Filter/Sketch/Chrome…10/10.
8. Change top layer to Color Burn.
9. Switch back to bottom layer and Ctrl+U and then select colorize…205/50/50.
You should be left with something like:
