May 21, 2025
Rust might start as a small cosmetic issue, but if left untreated, it can quickly become a serious problem - damaging not only your car’s appearance but also its structural integrity. What begins as a faint orange blemish can spread fast, eating away at exposed metal and weakening key components.
Common causes include everyday exposure to moisture, road salt and even minor paint chips or scratches that leave the underlying metal vulnerable. However, with the right approach, you can stop rust in its tracks and restore your vehicle’s condition.
Not all rust is the same - the type you’re dealing with will determine how easy it is to fix. Here’s a quick breakdown :
● Surface rust
This is the earliest and most common stage of rust. It usually appears when your car’s paint is scratched or chipped, exposing the metal underneath. The good news? It’s the easiest to fix if caught early.
● Scale rust
If surface rust is ignored, it can develop into scale rust. This type starts to corrode the metal beneath, creating rough, flaky patches. It may require more thorough sanding or grinding to remove.
● Penetrating rust
This is the most advanced and damaging form. Penetrating rust eats through the metal, creating holes in body panels or even the car’s frame. At this stage, professional repairs or panel replacements are usually needed.
Before you get started on fixing rust on your car, make sure you’ve got the right gear to tackle the job. Here’s what you’ll need :
● Sandpaper or a wire brush – to remove rust and any loose paint
● Rust converter or neutraliser – to stop the rust from spreading
● Body filler (if needed) – for filling in deeper pits or holes
● Primer and touch-up paint – to restore and protect the surface
● Microfibre cloths and clean rags – for wiping down the area before and after treatment
● Protective gloves and eyewear – to keep you safe while you work
Having everything ready beforehand will make the process quicker, easier and far more effective.
Fixing rust might seem daunting, but with a little time and the right approach, it’s absolutely doable. Follow these simple steps :
1. Clean the area thoroughly
Wash the rusted section with soap and water to remove any dirt, grease or loose rust. Dry the area completely before moving on.
2. Remove the rust
Use sandpaper or a wire brush to scrub away as much rust as possible. For stubborn spots, apply a rust converter to neutralise corrosion and stop it from spreading.
3. Fill any holes or pits
If rust has left behind deeper damage, apply automotive body filler. Let it dry fully, then sand the surface until it’s smooth and level with the surrounding area.
4. Prime and paint
Spray a rust-resistant primer over the repair and let it dry. Then, apply matching touch-up paint in thin, even layers. Once dry, finish with a clear coat to seal and protect the paintwork.
5. Let it cure
Allow each layer - especially the paint and clear coat - to dry completely before exposing your car to the weather or washing it.
Rust repair on a car is all about doing it right the first time - here are the common mistakes that could set you back.
● Ignoring minor rust spots – Even small patches can spread quickly if left untreated.
● Using the wrong tools or cleaners – Household products or abrasive tools can damage your paintwork and make the problem worse.
● Failing to seal the repair properly – Skipping primer, paint or clear coat can leave metal exposed and vulnerable to new rust.
● Choosing non-rust-resistant products – Always opt for materials designed to protect against corrosion for long-lasting results.
The best way to deal with rust on your car is to stop it before it starts. Here are four key steps to help protect your car’s bodywork long term.
● Wash your car regularly – Remove dirt, grime and road salt that can trap moisture and trigger corrosion.
● Apply wax or sealant – A protective layer of wax or sealant adds a barrier between your car’s paint and the elements.
● Inspect and touch-up paintwork – Small chips or scratches can expose bare metal, so it's important to touch up damaged areas promptly.
● Keep the undercarriage clean – Rust often starts underneath, so clean the undercarriage frequently, especially after driving on salted roads.
Regular washing is key to preventing rust on your vehicle and Star Car Wash makes it easy with expert services designed to protect your vehicle.
Star Car Wash provides hand wash services using pH-neutral shampoos and high-quality products that are tough on grime but gentle on paint. With locations across Australia and a range of professional detailing options, we ensure your vehicle stays clean, protected and rust-free.
Catching rust early is crucial to preserving your car’s appearance and structural integrity. Regular washing, thorough inspections and prompt repairs can help you prevent costly damage.
Make rust prevention part of your routine with regular washes and detailed inspections to keep your vehicle in top condition. Book online today or visit your nearest Star Car Wash branch.
