Possible Clues:

• Colourful type of piece on square meal doing the rounds
• *Bluish-gray color
• Alloy not encountered in a female, commonly
• Grey knight in fix -- and others
• Colour of bottle, say, behind heater perhaps
• Corrosion-resistant form of bronze
• Dull bluish-gray color
• Weapon gathered aluminium alloy
• Charlie gets back around mid-morning, overdue — turning a dull grey colour
• Unsatisfied female dresses in sheeny colour