Clean the bed with hot water and dish soap to remove any dirt, grease or grime. Rinse well. If the bed is lacquered or not tarnished, cleaning with dish soap and water should get the bed clean.
Use a commercial brass cleaner/polish labeled safe for antique brass to remove any tarnish. Light tarnish can be removed with liquid polishes; heavy tarnish may require the use of paste cleaner/polishes. Rinse or buff according to package directions. Alternatively, use a homemade brass cleaner made of equal parts salt and flour and enough white vinegar to make a paste. Rinse well, then dry the bed.
Buff bed with soft cloths to restore shine.