If the dye rubbed off, there is a thread by katev in which she used paint to repair her metallic bag. Color transfer is almost impossible to get rid of. If you use a cleaning product strong enough to remove it, it will damage the leather finish as well.
I have that bag in the wisteria so it isn't metallic. Over time, the leather has wrinkled some so the embossing isn't as evident as it once was. Is that what you are referring to as the natural texture?
I have another metallic bag that I have scotchguarded. If you get your bag fixed, you should treat it with Apple or Scotchguard to protect it from further damage.