How to Keep your Grill from Rusting
Grilling is a beloved pastime enjoyed by millions, but grill maintenance—particularly rust prevention—can feel overwhelming. Rust, a type of corrosion that forms when steel meets moisture and oxygen, doesn't just diminish your grill's appearance; it can compromise performance and shorten its lifespan. The good news? Rust is preventable with the right approach.
Whether you're a seasoned grill master or just starting out, these proven techniques will help you keep your grill in top condition and enjoy perfectly grilled meals for years to come.
Seasoning Your Grill Grates
New steel grill grates arrive uncoated, much like cast iron. To prevent rust, they need regular seasoning with oil—a process that creates a protective barrier against both oxygen and moisture.
The most effective seasoning method uses melted animal fat trimmings. Purchase an untrimmed cut of meat and save the trimmings. Once your grate is hot, drop the fat directly onto the center and let the heat soften it. Using tongs, rub the entire grate with the melting fat ball, ensuring complete coverage. This approach provides superior protection compared to other oils.
For ongoing maintenance, season your grates before and after each cook. If animal fat isn't available, olive oil works as a solid substitute—especially once you've established a good base season. After cooking, use a grill brush, wet rag, or grill pumice to remove food particles, but avoid scrubbing away all the oil. A light coating of seasoning between uses is your best defense.
A helpful note: Minor rust on steel grates isn't a health concern unless particles are actively chipping into your food.
Proper Storage and Moisture Control
Moisture exposure is a primary rust culprit. When your grill isn't in use, protect it with a quality cover or store it under an overhang or covered area.
For smaller grills, an oversized gas grill cover is an economical choice and readily available at hardware stores or online retailers. For larger or uniquely shaped grills, a custom canvas cover offers superior protection. Many grill owners have had excellent results with brands like Grill Wraps and Commodore Canvas.
Water accumulation inside the firebox is another concern. Wet ash is caustic and can eat through steel over time. Installing a ball valve drain kit prevents water buildup and protects your firebox. Additionally, remove ash after each cook to minimize moisture retention and rust risk.
Removing Existing Rust
If rust has already taken hold, don't despair. Depending on severity, you may be able to restore your grates.
A polycarbide abrasive wheel or paint and rust remover disc on an angle grinder efficiently strips rust and paint down to bare steel. As you work, you'll quickly determine whether restoration is viable. If you see shiny steel underneath, you're in good shape. A wire wheel brush can then tackle rust in hard-to-reach areas.
However, if you spot holes, excessive thinning, or rust that has penetrated completely through the material, replacement is the safer choice.
Choosing the Right Material
Steel and cast iron grates are functional and economical but require consistent maintenance. If you prefer a material naturally resistant to rust, stainless steel is the superior option. Stainless steel grills outlast their steel counterparts many times over, thanks to their inherent corrosion resistance.
For expert guidance on grate materials and replacement options—or to explore our full range of premium custom grills—or call (805) 637-6700. We specialize in heirloom-quality wood and charcoal grills, Santa Maria grills, Argentine grills, and gas grills built to last.