Understandable why one would want to maintain that fresh, milled aluminum look, it is stunningly beautiful. However, I never found a good way to do it and in my attempts with several different products found that it looked worse when I was done. Walnernizing can be a literal “black rabbit hole” that is hard to get out of once you start.
Embrace the patina and put a coat of wax on it once a year or so to prevent pitting and oxidation . I use this wax
https://a.co/d/00XNy00. I actually like the satin patina that comes on naturally over time.
My opinion only, yours may differ