In the AllPar.com pages, there is an interesting story written by Curtis Redgap that accounts his family's history with the Chrysler Corp, and gives some insight to cars of the 1950-60's. This story begins at this link, http://www.allpar.com/history/inside/ More specifically to this discussion of 1957 models, a specific paragraph reveals some intersting facts. This link will direct you to the particular page where info about the steel supplied to the US auto industry can be found, http://www.allpar.com/history/inside/plymouth-6.shtml An excerpt from this story: "Some 20 years later, in the 1970s, it was suspected, and alleged that in a government effort to aid the economy of Japan in the mid 1950s, steel was melted down for shipment to the United States. Under a subsidy, this steel was sold to the largest users, which of course, was the automotive industry. Purportedly this steel was from the Atom Bombed buildings left in Hiroshima and Nagasaki. Of course this does raise a deadly radio activity question, however, conclusive tests showed that remelted iron and steel returns to normal, since it is a "new" metal. The true issue was that it contained high levels of iron, which is a notorious oxidizer. As well introduction of nickel or chromium, into the molten steel, which are good oxidation resistors, was prevented due to cost considerations!" Lower quality steel, used industry wide, may explain the typical corrosion problems of cars of that era. Alfa Romeo had a similar problem in the 1970's. They were supplied with cheap, recycled steel for their Alfa Sud cars, built in southern Italy. Those cars were notorious for rust. Eric '63 Crown Four-Door '72 Newport Custom Sedan