Rehabbing a vintage Speedy

I know there must be others out there like me. People who are so obsessed with handbags, that it's gotten to the point that the more "vintage" a bag, the more history behind it, the more beautiful it is. I also have a thing for "project bags." Don't ask me where it came from!

I recently acquired this 14 year old Speedy 30 from an acquaintance

 She is just gorgeous if you ask me, so well loved and has seen many miles. She is still incredibly strong with no rips, tears, or pulling away from the canvas at the handles. There are only two real flaws with her, which I'm needing your advice about! Read below for more.

 First, as you can see here, the zipper pull is broken. Not sure what to do about that. The zipper had already been replaced once, and obviously the previous owners chose a bit of a cheap route and did not reapply a good quality zipper. Hmm.

The second problem is the handles. They are extremely patinad, almost to a fault. At TBF I was told to use a magic eraser - well, I did that to the one handle on the foreground, and as you can see it created a much worse look.

Any more advice for getting this baby into better shape?

xx Holly