How to Deal with Rust Spots on a Car?
3 Answers
To address rust spots on a car, you should apply glaze sealing to the car body, which forms a protective film to enhance the hardness of the paint surface. This treatment can last for about a year. Coating can also serve a similar purpose. If the rust spots are caused by acid rain corrosion, waxing is an option, typically done every 2 to 3 months. As a traditional aspect of car detailing, car waxing primarily serves to waterproof and protect against acid rain. The wax's protective layer significantly reduces water droplet adhesion on the car body, with effectiveness ranging from 50% to 90%. Additionally, waxing helps guard against high temperatures and UV rays. Cars driven or stored outdoors year-round are prone to paint aging and fading due to sunlight exposure. The film formed by waxing reflects some of the light, effectively preventing paint aging. Furthermore, car wax can prevent static electricity and also acts as a dust repellent.
When there are rust spots on the car, here's how I handle it: First, I wear gloves to protect my skin, then gently sand the rust with fine sandpaper until smooth—don't press too hard, or you might scratch the good paint. After cleaning the area, apply a layer of rust-proof primer to prevent further corrosion. Wait for it to dry, which takes about half an hour, then carefully apply matching topcoat paint in several layers for even color. It's best to do this in cool, dry weather, as high humidity can cause bubbles. Just use ordinary sandpaper and a car touch-up paint kit, which can be bought on Taobao for a few dozen yuan. The key is to treat small rust spots early, or else rain can cause them to spread into large rust patches. When parking, avoid parking under trees, as bird droppings or leaf residue can accelerate rusting. I did this myself once, and it worked well while saving money. Remember to regularly check hidden areas like wheel wells and door seams—prevention is the most effective approach.
Upon spotting small rust spots on the car body, I immediately took action to prevent spreading. First, clean surface dust and dirt, then gently sand away the rusted areas with sandpaper—maintaining steady, light pressure to avoid damaging the primer. Apply rust-resistant primer to reinforce the protective layer, let it dry, then cover with matching paint; for deeper rust spots, use repair putty to fill pits. Regular maintenance is key: waxing after each wash creates a moisture barrier, reducing rust risk. As a long-term owner, I recommend keeping a basic toolkit (with sandpaper, paint, and brushes) and inspecting rust-prone areas like the undercarriage or seams after heavy rain. Early treatment saves hassle and money—neglected rust can spread to structural components, raising repair costs. Taking a moment to check the car’s condition before driving ensures both safety and aesthetics.
