I don't have a picture of my hub at the moment. At a glance no one would be able to tell, none of the hub internals are exposed from what I remember so the dust cover works just as it should.

When I installed my freewheel and it seized the dust cover/cone, it created a minor mark or indentation around the dust cover - I used that as reference for how much to file. I removed the cone and held it in one hand and used a metal filer in the other, working my way around until I got to the indentation created by the freewheel. It probably took me about 20 minutes of filing (with a ****ty file)... I would also use the freewheel to see when the cone would barely pass through. When it was just barely able to pass through, maybe slightly catching, I stopped there and figured the rest of the freewheel would smooth out the cone, giving it a smoother cleaner look. It worked well.