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Old 11-29-2007, 09:33 AM
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Not sure if it would get brittle enough to crack sheet metal but I have chilled a lot of pins and other small parts with Nitrogen to shrink them whenever assembling parts with an interference fit. Sometimes even after shrinking it would take a good pounding with a sledge hammer to get some of this stuff "assembled" and we never really had much problem with anything breaking. The notable exception to this was hardened bushings which would sometimes break with only a light tap after chilling but these were already hard as $4 worth of jaw breakers before the Nitrogen bath. I doubt if chilling the sheet metal would cause much of a problem as far as becoming brittle but to be honest I have never tried it so I could be wrong about that.

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Old 07-18-2010, 08:09 PM
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According to this dry ice website, dents can be removed from cars by using dry ice and heat. It does not go back the way it was. You can watch videos to see the method for doing this, but goes something like this. Heat the dent. Apply dry ice. Watch dent pop out. It really is amazing to think that you can get rid of a dent for about $5.
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Old 07-19-2010, 07:34 AM
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As a follow up to this thread (originally posted in 2007) our own MARTINSR conducted a number of experiments busting this myth. You can read and see the results in this thread.
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