(It was a comedy of errors I'm not going to describe that caused the print to end up in the garbage.)
Should I spray the photo lightly with some distilled water and then try to flatten it and let it dry? How do I avoid having the emulsion sticking to whatever I put on top of the photo to flatten it?
In other words, I want to restore the photo to more or less its original condition so it can go back into the album.
I do have a fallback plan which is to scan the photo. However, I would be concerned about cracking the emulsion if I tried to force the photo as it is now flat, and again I'd really like to return the photo to the owner in a condition closer to the original.