I agree we should not be punished for a design flaw, but it will be awfully hard to get them to admit there is a flaw. Also rust issues are very subjective and most rust warranties are for rust through and not surface rust, which is what I bet they will call this. I agree it may be something worth fighting for, but if it is not something that is taken care of now before it is too late, one might win the battle but lose the war, so to speak.