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look, when not BSing around I use this site primarily as a source of education and learning. That means information exchange, and I do my part to make sure the information here is as accurate as possible. You stated you cannot anodize stainless steel. Well you can, and I was willing to back up that assertion with examples. Hell, I learned something even doing a quick search for a few examples, as I assume electrolytic anodization of stainless was not a thing, whereas it absolutely is. I would not have learned that if not for this discussion.Fine. You win. You can be the most technically correct person on the internet today. Congratulations.
Anodization in the industry is not typically used in the nomenclature. Yes, I learned something new, but JFC your quest to be technically right is ridiculous.
I will maintain that anodizing is not commonly applied to stainless steel. None of the methods you linked are commonly used in any of the shops I've used or worked in. I'm quite confident if you call up a dozen shops and tell them you need to have some stainless parts anodized, they are going to tell you it can't be done.
Back to this specific example, I know that they use lasers to "color" steels of all types including stainless, and that "color" (colloquially called "temper") is an anodization layer. I am not even sure what else it would be called, so maybe you can fill me on on other colloquial names for the finish. I assume that a laser is how it was done in this case, but I acknowledge there may be other methods to achieve the same result. I also assume the darker spots are also done with a laser, though there are other possibilities there too.
I am not doing all this to annoy you specifically, I do what I do to set the record straight and provide enough evidence to justify my position so that other people can make an informed decision on their own.