- Take a glossy postcard and cut one frame sized window
- Put negative with scratch over window and tape edges of negatives down
- Dip q-tip in distilled water
- Blot it semi-dry on hand and then rub the scratch with it
- Blow dry the negative dry
- Then fill a steamer with distilled water and a teaspoon of salt
- Get is steamin' and put negative over it
- Then blow dry it dry and repeat a few times and. . .
BOOM! You're dead!
Just kidding. . . the scratch goes away.