Question Yellow blobs on the lid of a white variant of Zephyrus G14 (2021)

[AnirbanB]

Query: What does cause this discoloration with yellowish blobs? Is the property of the anodized color on this magnesium alloy-made lid, being faded? I don't keep my system unclean. Hence, I'm wondering.
Does this yellow tinting have any common process like a transparent cellphone cover getting the same way?
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Measures: Firstly, I applied 70% and then, 99% pure Isopropyl alcohol to remove it. Neither did work.
If this is an inevitable chemical reaction over time, then I would not ruin the body of the lid in order to remove it. Regardless of scenarios, let me know the causes.

Attached photographs:
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[lvt]

Try vinegar or lemon juice.

 

[AnirbanB]

Try vinegar or lemon juice.

Unfruitful.

 

[lvt]

Unfruitful.

Are the blobs expending?

 

[General_Cool]

https://ui.adsabs.harvard.edu/abs/2013JMEP...22...50L/abstract

 

[AnirbanB]

https://ui.adsabs.harvard.edu/abs/2013JMEP...22...50L/abstract

Contrary to the brownish coloration-
3.3 EDS analysis: last paragraph
3.4 Corrosion behaviour: 2nd paragraph
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https://iopscience.iop.org/article/10.1149/2.065406jes