Rust as well as rust spots from tiles, paving stones, concrete, and non-calciferous natural stone. No stain can stand up to the HG stain away series because the 7 different stain removers each have their own specialist subject but together, they can beat any stain.
I had a garment with several deep ink stains thereon . Stain removers would not shift these stains, but when I used the ink remover it eventually removed all of the stains.