Can Grease Be Applied to Rusty Car Side Skirts?
3 Answers
Applying grease to rusty car side skirts is not recommended. Here are solutions for dealing with rust on car side skirts: 1. If the rust is not severe, you can first use very fine water sandpaper dipped in water to gently sand away the rust spots. After completely cleaning the area, apply a layer of primer to ensure the rust does not spread or worsen. 2. For new scratches, clean the area and directly apply primer. Most vehicles come with a small can of original paint. Applying primer helps prevent rust and enhances the adhesion of the topcoat. 3. You can purchase a touch-up paint pen in advance. After the applied primer dries, sand it smooth with water sandpaper, then use the touch-up paint pen for color matching. This method is suitable for small scratches or inconspicuous areas. 5. Toothpaste can also be used. For minor new scratches, simply apply a little toothpaste. After rain or washing the car, remember to reapply it to provide a simple barrier. While this works temporarily, a professional paint repair is ultimately needed for a permanent solution.
As a car owner who often maintains my old car myself, I don’t think applying grease to rusty side skirts is a good solution. While grease can temporarily cover the rust, it tends to attract dust and absorb moisture, which actually accelerates corrosion. I tried this quick fix before, and the rust worsened within two months. A more reliable approach is to first remove the rust layer by sanding or using a rust remover, then apply professional rust-proof paint, followed by matching body paint. This blocks moisture and air from penetrating, preventing structural damage. Regular car washes, especially focusing on the undercarriage after snowy winters to prevent salt buildup, can help avoid rust. If left untreated, rust can spread to the car’s frame, potentially compromising safety at high speeds.
My buddy also asked about using grease for rust prevention, but that sticky stuff just causes more trouble. It attracts dirt from the road and turns into a messy paste after rain, actually making rust worse. Last year when rust spots appeared on my car's side skirts, I almost applied grease until I changed my mind after reading online advice. Later at the repair shop, they simply used rust removal tools for cleanup and sprayed an anti-corrosion coating. It cost a bit but proved effective and durable. Rust usually occurs when metal is exposed to rainwater or chemicals, and delaying repairs can weaken the car body, even causing issues at chassis connection points. My advice - don't procrastinate, getting proper rustproofing is more cost-effective and extends your car's lifespan.
