autosol https://www.amazon.com/Autosol-Utosol-0400-Metal-Polish/dp/B003XJ1ODM + paper towel. here is a video of it being used https://www.reddit.com/r/powerwashingporn/comments/e5ve6e/wednesday_antique_saber_cleaning/ if you polish long enough it will remove a patina from antique sword but it takes a long long time to do that. its "made for chrome and aluminium" so its very very light but works super fast despite how light a abrasive it is and doesnt leave scratches.