Have you tried Bag Balm?
Also, if the scratches are more like whelted scars, scub them every other day or so with soap and water, then moisterize with 'Mane & Coat' or a good lotion.
Work it in, but just like human scars, it might take a while (weeks to months) for them to go away.
Have you removed whatever it was that caused the scratches?
Hope this helps and please remember to press the 'accept' button. Let me know how it goes.

