Since the Chinese calendar is a lunisolar calendar, the last day of a year is also called lunar New Year's Eve (Traditional Chinese: å¤§å¹´å¤, Pinyin: dÃ niÃ¡nyÃ¨, translated: old, large, huge, major, important year's night).
While aluminium doesn't rust, it often becomes dull from corrosion, and is often encrusted with brake dust, calcium, lime, tarnish, grease, oil and hard water stains. Simply washing it off will not work, you need something stronger and more effective to do the job.
Aluminum may also corrode when in contact with wet lime mortar, Portland cement, plaster, or concrete before they are fully cured, damp, porous brickwork and stonework. To protect aluminum against contact with masonry, apply a coating of bituminous paint, followed by 2 coats of aluminum metal and masonry paint.