Rolex Hands Bubbling

[astrobi_astrobi]

Dear Rolex gurus,

My Rolex Explorer 114270 was recently serviced by RSC Manila last month. While cleaning the watch, I noticed that the seconds hand has mild bubbling (not sure if its the right term) on it. Since it began to bother me a little, I called up RSC to inquire if they have forgotten to clean it during the service. :D The lady on the phone said that they don't actually subject the hands to intense cleaning as they are very delicate. Here are my questions:

1. I got an online info that modern Rolex hands are made of white gold rather than steel. If that is true, how come there is a mild bubbling on the seconds hand of my watch?
2. Should I be bothered that the bubbling may extend and start to corrode the rest of the seconds hand and damage the dial in the long run?
3. Will you advise me to replace it with new set of hands (cost is around $150)?

Any similar experience?

Please bear with the photo as I took it using my point and shoot camera.

Thank you in advance.