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.
Ensure that the metal you are working with will rust. Only metals containing iron will rust, and some iron alloys will rust slowly or not at all. Stainless steel, an alloy of iron and chromium, will be very difficult to rust. Cast iron or wrought iron will rust most easily.