Possible Clues:

• Shows signs of age, in a way
• Ages like iron
• Deteriorates, as iron
• You and me are going in the right direction providing it loses colour
• Becomes inoperable, maybe, as an old machine
• Corrodes, as old bikes
• Ages from oxidation
• Gets creaky, say
• Gets eaten away, in a way
• Picks up brown coat leader of hospital body’s dropped