I didn't see the shailo yet itself however I heard today someone say they found a Beis in a Mezuzah that the tag is somewhat "smudged". To what degree or how much I don't know. However what would be the din if ...
(1) It's not niker anymore as a tag. Should they erase it and attempt to fix it? Or simply erase it and leave nothing there.
(2) Is niker but however "not so nice" because it's smudged. The same thing, should this be erased and fixed or erased and not fixed? Or not to erase at all?
I realize it's difficult to describe without a picture. Maybe I'll try and get if I can before whatever happens, happens.