Lemon Juice and Salt Method

• 1). Pour several tablespoons of household table salt on to the metal stain. Arrange the salt crystals to form a small pile on top of the stain.
  
  
• 2). Pour a tablespoon of lemon juice over the pile of salt.
  
  
• 3). Allow the salt and lemon juice mixture to sit on the stain overnight.
  
  
• 4). Check the salt for a change in color. The salt will appear rusty as it draws the stain out of the porcelain. Rinse the stain with water to remove salt and lemon residue.
  
  
• 5). Gently scrub with a pumice stone to remove any remaining metal stains.
  
  

Ammonia Method

• 1). Add one part ammonia and one part room temperature water to a medium-sized mixing bowl.
  
  
• 2). Pour the ammonia and water solution over the metal stains.
  
  
• 3). Use a soft scrub brush to scrub away the metal stains.
  
  
• 4). Rinse away the ammonia solution with cool water.
  
  
• 5). Pour any remaining ammonia solution down the toilet or tub drain to rinse out potentially rusty plumbing.