Yes it could but it'd be a lot of work, made lots easier if you can remove the end cap, and maybe have a bench polisher but that isn't needed.
Don't be tempted to just "give it a rub" with some cutting compound or you'll just a get a shiny patch that will highlight it further. It you start to cut/polish it you'll likely have to all the visible areas so it blends in.
The normal way of dealing with that would be to cut back with sandpaper (then wet & dry) until the scratch has gone and then resurface to the desired finish.
I'd just learn to live with it, maybe keep an eye on fleabay for a replacement.