Quality of stainless steel frame Iphone 12 Pro

Hi guys,

Have anyone spot a poor quality of frame on Iphone 12 Pro??

I have iphone for 3 months already and from the beggining it was used with rubber Ringke case.

I wanted to clean my phone, I thought it was just dirty. But it seems like scratches or oxidation ( I don ´t really know) on my frame. I am so angry, I have never seen something like this before and it was used just with that case.

Do you think it is a quality issue of my iphone? Because Surgical steel should be more protective and none oxidant. I am bit dissapointed. Do you think Apple would take it as guaranty?

manny thanks,

Hana