Rinse the paste off and then dry the metal, if some of the rust remains you can repeat this method until you have removed all of the rust.
2. How to leave mirrors and windows streak-free
Cleaning mirrors and windows can be a headache after hours of work you can be left with unsightly streaks across your surfaces.
Then rub this over your grubby mirror or windows, after, use a clean cloth to wipe the solution away using fresh water.
To finish polish the mirror with an old crumpled newspaper for a smudge-free surface.