Tried this on the absolute worst leg I could find. The rust is gone. It cleaned up the leg leveler too which was previously frozen. This stuff makes me think that I should be careful when throwing away anything that seems too rusty
I'll use the leg on the back.
thumbnail_20180317_132136%5b1%5d (resized).jpg
thumbnail_20180319_200112%5b1%5d (resized).jpg