Some of my vintage Magnalite aluminum cookware displays normal annodization from use but also has stains and/or somewhat rough interior surface areas that I'd like to correct. The roughness may have been caused by letting pans soak, which I did with one pan after a recent use and have since found out isn't advised, and which created small white bumps that seemed like calcium formations. The bumps washed off easily when I cleaned the pan, but I think they may have left some roughness behind. An online search produced a few hits that provided advice along the lines of "you can try a paste of lemon juice and baking soda," which doesn't exactly sound like there's much confidence behind that method.
I know about cream of tartar, but am not so sure that would resolve the roughness issue. Would Bon Ami or BKF applied with a green scrub pad be safe? The stains around the sides don't show up well in the picture, but they're brownish and presumably food-based. Any suggestions are welcome.

I know about cream of tartar, but am not so sure that would resolve the roughness issue. Would Bon Ami or BKF applied with a green scrub pad be safe? The stains around the sides don't show up well in the picture, but they're brownish and presumably food-based. Any suggestions are welcome.
