Water spots can ruin the surface of an oil-rubbed bronze faucet if not properly cleaned. Before you attempt to clean the spots, it is important to understand the type of finish you are dealing with. Oil-rubbed bronze is softer than chrome or steel, so it requires special cleaning solutions. Using the right mixtures of household ingredients will clean most water spotting and return the faucet's luster in less than 10 minutes.
Clean the faucet surface with a clean towel to remove water spots. A lint-free cleaning towel, flannel cloth, or micro-fiber cloth is an excellent choice for this step. If spots remain, move on to the next step.
Mix 1 tablespoon of salt into 3 quarts of mildly warm tap or distilled water and stir the mixture until the salt dissolves completely.
Spread the salt and water mixture over the faucet and scrub off the water spots with a bristle brush. Wipe the solution away, rinse and then dry the faucet with a towel.
Remove more difficult water spots and mineral deposits with a pasty mixture of salt, vinegar and flour. Mix 1 teaspoon of salt into a cup of vinegar and then mix this solution with flour until you have a gritty paste.
Spread the paste over the water spots and let it dry for about an hour. Rinse the paste away and wipe down the faucet with your cleaning towel.