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If you live in a state that uses salt to clear ice from the roadway, then you need to rinse the bottom of your car to get the salt off. Be sure to get all the nooks and crannies that the salt can get into. Otherwise, you can buy a spray on undercoating from any auto parts store.

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14y ago
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Q: How do you prevent rust from the bottom of your car on an 1992 Buick Roadmaster?
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