Does anyone know if any special care is needed to take care of a raw aluminum (6061) pen? I don’t mind scratches or usual signs of use and wear/tear, I am thinking of things like corrosion or chemical-patina-like things. I tried a quick Google and thread search on this question, but didn’t find conclusive answers.

Also, apparently it can develop its own natural anodization with time. Does anyone have experience with that?
Thanks.