Vintage Chinese cigarette cloisonné box metal

Vintage Chinese cloisonné box metal for jewelry, stash, or cigarettes/cigars. When researching this came up as a vintage antique Chinese cigar box, but it could be anything prices range from $32 to 270. Heavier metal. Might be brass. Not sure how to clean it. The scrolls could be shined up to let bright blue background shine thru but because of age, not sure best way to clean but retain the condition.