You should find that a warm water/dish soap mix removes rust stains easily from concrete, though you should avoid scrubbing too hard so as not to mark it. Failing that, try lemon juice on the stain, allowing it to...

A fairly new rust stain may succumb to the mild acid of white vinegar. Pour the vinegar over the stain, let sit for 10 minutes, then scrub with a stiff nylon brush. Rinse and repeat if the concrete doesn’t come...

Mix several drops of dish soap with warm water in a bowl. Dip a stiff brush in the mixture and scrub the rusty areas. Rinse well with a hose or pressure washer. If stubborn rust stains don’t come out of concrete...

For cleaning concrete, pour the lemon juice or vinegar directly onto the rust stain and allow it to sit for ten minutes, so the ingredients can fully penetrate the rust. Using the scrub brush, scrub the stain, using...

Apply the lemon juice or vinegar all over the rusted surface and allow it to sit and penetrate the rust for at least ten minutes; then, using a wire brush, scrub the rusted area using enough pressure. Work in small...