For any of you who openly display your figures in loose condition whether it be on shelves, a bookcase, or on top of a table, etc., have you experienced yellowing of any kind? I hear oxidation only happens when there is air flow in and around objects, but if the item is kept inside a cabinet or case of some sort, it reduces the chances of oxidation/yellowing. Can anyone expand on this or care to voice their opinions on the matter? Would love to hear what you guys think. Thanks.