How to Deal with Large-Scale Rust on the Car Body?
2 Answers
Methods for dealing with large-scale rust on the car body: 1. Manual rust removal: Use tools such as scrapers, knives, pointed hammers, and wire brushes to knock, scrape, and remove rust, followed by sanding with sandpaper; 2. Mechanical rust removal: Use rust removal tools like pneumatic brushes, electric brushes, rust removal guns, rollers, and electric grinders to remove rust and oxidation layers; 3. Sandblasting rust removal: Use high-pressure water flow to project abrasives, sand, or steel shot onto the surface, removing rust through impact and friction; 4. Chemical rust removal: Utilize acidic solutions such as sulfuric acid, hydrochloric acid, nitric acid, or phosphoric acid to chemically react with rust, forming salts that detach from the metal surface.
I've been driving for over twenty years and have seen extensive body rust many times. Dealing with it isn't actually that difficult. Once rust appears, first assess the extent: if it's just surface rust spots, I recommend using sandpaper or power tools to grind off the rust layer yourself, clean it thoroughly, apply primer, and then touch up with some spray paint to manage it. However, if the rust area is too large or there are perforations and deep pits, you'll need to visit a professional auto repair shop. The shop will use professional equipment to remove rust, weld patches, or replace parts to restore the body's strength. Severe rust can affect safety, such as weakening the frame, which may even cause brake issues. Regular maintenance is crucial, especially drying the seams after washing the car to prevent water retention; spraying some rust-proof coating on the undercarriage can also delay rusting. Additionally, don't overlook areas like the wheel arches or the lower edges of doors, as these spots accumulate water and rust spreads quickly. DIY can save money, but ensuring structural safety comes first.
