While fixing surface rust is usually easy to DIY, structural rust damage to the frame is an entirely different story and ...
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How To Repair Rust on a Car

Rust on bodywork lowers the value of your car and besides, it's just downright ugly! Here's how to fix it.
Truck beds have a difficult life. They live out in the elements, they have things dropped and thrown on them, and generally get beaten up while being the reliable, utilitarian vehicles that they are.