Apply a small amount of salt over the rust surface. Squeeze half of a lime over the salt to cover the rust area and let the lime juice soak on the stain for two to three hours. Scrub the faucet with the lime rind to remove a light rust stain.
Soak paper towels in white vinegar. Wrap the towels around the chrome faucet and let them soak overnight. Wipe the chrome fixture with a nonabrasive sponge to remove the rust stain.
Mix an equal amount of sodium borate with lemon juice to create a paste. Apply the paste to the chrome faucet with a washcloth. Let the paste dry and then rinse the chrome with clean water.
Combine 1 part oxalic acid with 10 parts of water. Pour the solution into a spray bottle and soak the rust area. Rinse the faucet off with clean water.
Dissolve oxalic acid crystals according to the package directions. Slowly add whiting to create a paste and apply it to tough rust stains. Let the paste dry on the faucet and then rinse with clean water.