After many decades sometimes corrosion starts to form underneath the clear anodizing of the moldings even in the wrappers. Fortunately this is only sometimes. The seller may not be aware of any defects because they are in wrappers. It is not out of the ordinary to find one or more out of a set to have minor corrosion defects once taken out of the wrappers. People who have restored multiple 68's using NOS moldings know this . Unless a seller wants to guarantee that the moldings do not have defects inside the wrappers a buyer takes a real gamble by buying the wheel moldings sight unseen IMO.