what's the cheap DIY version of this?

>Save thousands over stripping and re-anodizing damaged parts. Much better than using a black marker or paint, the solution chemically converts the aluminum into a black color with a permanent repair. Won't chip, peel or rub off.
https://forums.pelicanparts.com/porsche-911-technical-forum/1071029-restoring-black-anodizing-easy-peasy.html

feeding the SDS chemicals into AI btfo'd anons

>>2921758
i did this with paint. like is sherwin wiggum better than benjamin bond and the AI told me mr bond is best.