Quote Originally Posted by jim appleyard View Post
Glycerine is water soluble. Perhaps if you thinned it a bit?
You don't want to use anything that has water in it, as this will cause the emulsion to swell and become fragile. Your best bet is to use a petroleum based product, turpentine, if you can't get No Scratch.

Any type of light mineral oil type substance should work to temporarily fill in the scratches, and then can be removed with film cleaner, which is a solvent that removes oils.