Out here in the dry western plains zinc rot seems like an almost unknown problem. I get the impression that it is primarily a moist climate issue. Does that seem to be the case with those who have had issues? Even so, that does not explain the OP's case where the car in question was brand new in a sealed package, which presumably would have had one or two silica gel packs to absorb any moisture in the air. Just curious is all. 
Rod
PS: MMM; can you decode "It's crackers to give a rozzer the dropsy in snide!" please, just for those of use who have no clue what this might mean? Thanks.
