greenacres, I was not unaware of your dilemma. I am just a common sense practical person and very seldom do I ever permit my “emotional” thoughts to affect my conversation with another person. But on those rare occasions that it does occur ….. then it is oftentimes “Katy bar the door”.
I first suggested that you just make a copy of the photo and repair it digitally because:
1. finding someone to repair it manually might not be possible.
2. if you found someone you would have to trust they could do it.
3. if it was repaired, the “fixes” might look worse than the scratches.
4. the “fixing” will be expensive regardless of the outcome.
5. the person might fix it the way I suggested and you would never know.
7. there is always the chance it would be destroyed during the fixing process
But if you fix it yourself via the way I suggested, then destroy the original copy, then no one but you will ever know that it is not the original one you gave her the first time and the provenance of the “picture” between you and your daughter is still maintained.