Remove the hardware and set aside any screws.
Put on the latex gloves. Mix dish soap and warm water in one pan. Scrub the hardware with the soapy water and the toothbrush. Rinse the hardware under warm water and then set it on paper towels to dry. Allow it to dry fully before moving to the next step.
Mix 2 tsp. of baking soda in warm water in one of the pans, stirring to dissolve. Set it aside.
Mix a pea-sized lump of liver of sulfur in 1 qt. of hot water in one of the pans. Stir until the liver of sulfur is dissolved.
Dip the hardware in the liver-of-sulfur solution with the tongs. Agitate the hardware in the solution continually until you get the desired color you want.
Dip the hardware immediately in the baking-soda solution to stop the darkening process. Set the hardware on paper towels to dry.
Polish the darkened hardware with the polishing cloth if desired.