Thanks for all of your replies. LV said they can't repair it. And all they could do is "apologies". I believe that if this phenomenon is common in Vernis, the least LV should do is to warn/advise the customers before they buy it. I would see this as a manufacturing "defect" and I am considering taking it all the way with LV. Why doesn't our Vernis type shoes (not LV brand) discolour ? Why doesn't our Vernis type handbag (not LV brand) discolour ? That is why I believe that this is a manufacturing defect and LV is be responsible/liable for this.
I agree, that seems like a manufacturing defect. I almost think they should stop selling Vernis unless they can fix the problem. I would not have known about it if I had not read these boards, and that is not fair to those who buy without that knowledge. It is not like these are inexpensive bags.