[Sorry: Didn't notice that you'd posted this question twice and already had it answered!]
No, you cannot "polish it off." The "toning" is the result of moisture/nicotine that colors the pipe from the bowl outward over the course of many smokes. For virtually all meerschaum smokers, this "toning" is something to be quite proud of! It shows that a pipe has been well-loved and colored over the course of time. Also, many meerschaums are carved with details that expressly highlight the coloring process down the road.
It's possible, I guess, that boiling the meerschaum would remove some of the coloring that has been developed. But unless you add bleach or some such, I cannot imagine it ever getting back to the original white mineral. And boiling would risk damaging/altering any carving on the pipe, as well as any kind of stem engineering (a screw-in shank, for instance) that might have been done.
I'd encourage you to cherish the antique meerschaum for what it represents. If what you really want is a pristine white pipe, then I'd recommend just buying a brand-new meerschaum and never smoking it.
Bob