Emmy award cleaning

Not sure if this is the right place for this question but maybe someone can point me to the right place. I got an Emmy award statue about 10 years ago for a project I worked on. In the last year or so I started noticing some oxidation on the statue on various places on it. Just wondering if anyone would know how to get clean the problem areas or maybe can get it sent somewhere to get cleaned? I've attached some photos, a little harder to see the spots in the full image of the statue but can see it on the globe.