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PennDOT Rust Compound

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This is what PennDOT calls "Traction Compound", a mixture of limestone chips and salt. I call it Rust Compound. First the limestone knocks your paint off and then the salt starts the rusting process. 
What you see it the photo is what I hosed off the bottom of my truck. Most of it was lodged inside the rear wheels where it was obviously causing a severe imbalance of the rear tires.


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