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Big..large capacity hopper for the sand or blasting media, and you will need to have a large commercial type compressor as blastng whole cars takes a lot of air..that is if you want to get done any time soon..
Just study on some of the warnings about warping sheet metal with a blaster..the sand acts like zillions of tiny hammers and will stretch the metal creating warps that are almost impssible to get out..
Sam
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I have tried most all of it and now do what is known to work..
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