I'm going to be the odd man out here, but storing patent leather in a closed environment (i.e., dustbag and cabinet) will cause it to discolor. That type of treated leather needs to breath. If you do a google search, there is a lot of information about how to care for treated patent leather. While I do think LV could do a better job of explaining to people the dangers of getting Vernis next to printed items, colors, etc. and how to store it, I just don't think that improperly stored patent leather would be the fault of LV, unless they just don't let anyone know at all how to store it, in which case there might be some negligence. It's just one of those hard things because it is a treated bag which needs to be cared for completely differently than regular leather or treated monogram canvas. I just needs to be stored differently, and cared for differently. I'm sorry this happened to your beautiful bag!