What to Do If There's a Rust Hole in the Vehicle's Metal Sheet?
3 Answers
If there's a rust hole in the vehicle's metal sheet, the rusted area needs to be cut out and then re-welded or treated with anti-corrosion measures. The materials used for automobile bodies can generally be divided into two major categories: 1. Metal materials, including heavy metals such as steel plates and cast iron, as well as light metals like aluminum, magnesium, titanium and their alloys, and foam metals; 2. Non-metal materials, including engineering plastics, fibers, resins, glass, rubber, non-metal foam materials, and non-metal composite materials. With the advancement of automotive technology, in addition to metal and non-metal materials, composite materials and nanomaterials will also see widespread application in future automotive materials.
I've been driving for many years and have dealt with numerous cases of vehicle rust and perforation. Last time, my old car had a small rust hole in the chassis, and I chose to fix it myself: first, I thoroughly sanded off the rust with sandpaper, applied a professional rust remover to stop the corrosion, then carefully filled the hole with body filler to make it smooth, waited for it to dry, sanded it down, and finally sprayed matching rust-proof primer and topcoat to prevent further rust. The whole process took two days, and the material cost was just around a hundred bucks, saving me a lot compared to going to a repair shop. The key is to conduct regular checks after the repair—I inspect the underside of the car every quarter for new rust spots, avoid parking in puddles, and dry off any moisture after washing the car. If left untreated, small holes can grow larger, and accumulated water freezing in winter may cause bigger cracks, affecting driving safety. Early repairs can extend a car's lifespan by several years.
I was shocked to find a rusted hole in the wheel arch right after buying my used car! Decided to tackle it myself: went to the hardware store and got a rust removal kit and body filler. First step was cleaning the rusted area with a wire brush, then applying rust converter to stop further corrosion. Filled it with automotive-grade filler, sanded it smooth, and finished with rust-proof spray paint. Though my arms ached afterward, the sense of accomplishment was huge – even a beginner can handle this! Cost me just over 100 yuan. Leaving it untreated would let rainwater seep in, accelerating corrosion, and might cause more damage near the tires. Since then, I've made prevention routine: wiping the undercarriage after drives and spraying rust inhibitor on vulnerable spots to avoid future headaches.
