Pros:
- it will be shiny (or should be)
- you will (or should have) all brand new steel exposed on the surface (may be important if you are unhappy/worried about whatever is currently there after a century).
Cons:
- it is irreversible, can't go back if you later change your mind
- it will cost you money (for a good job)
-
the lines may be softer (blurred), but the better (and generally more expensive) the restorer you should have less of that
- it will rust easier, at least initially, so you may need to be extra careful with it for a while
I can't think of anything else at the moment
