My Brooks B73 was visibly scarred in a fall. I dabbed on enough neatsfoot oil on a cloth to soak in but not through the leather, waited for it to dry to polishing stage, then applied a thin layer of Proofide, just a bit thicker than the very thin layer I apply to the seat twice a year. The scar is now much less visible, but it will always be there. It doesn't bother me. I buy my bike to use, and don't expect it to be pristine forever, though that doesn't mean I'm careless with it.
I should add that my saddle is protected to a thin layer top and bottom by being totally covered in neatsfoot oil for 20 minutes when new, so small scars, for instance made by my keychain dragging across it in the same incident, hardly show, because the color of the leather is consistent to deeper than the scratch. I know this upsets some posters but on my side I have Sheldon Brown, and people who were using Brooks saddles still when I was a boy that before WW1 they soaked in motor oil.
Because of the neatsfoot, the scar is now the same color as the rest of the leather, and thus easy to overlook, not so visible. In time it will become part of the saddle's life story.
