I always buy the silver iPhones because of this problem.
No coating on the silver stainless steal band plus like the look of the stainless steal finish.
is their a way Apple could stop this from happening?
How about melting the stainless steal then mixing the color into it?
So if it does scratch it’ll still look the same colour.
Armor for knights was colored using oxidation and heat. I saw an episode on Nova that showed the process that turns the hardened steel a wonderful blue color similar to what titanium looks like on an exhaust but over time it wear/fades away. Not sure how it could be done to stainless steel...Steel is molten at around 2500°F so I don’t think it’s possible to add pigment like you can with plastics, it would be vaporised. Certainly all the coloured steel we see has been coated/plated/painted in some manner. There’s bound to be someone on the forum who knows more about this topic.