Seasoning is a thin layer of polymerized oil baked onto the metal — it's what gives cast iron its natural non-stick quality and keeps bare metal from rusting on contact with moisture. Any real cleaning (scrubbing, degreasing, rust removal) strips some of it away, so re-seasoning is the step that finishes the job rather than an optional extra.
What you'll need
- A high smoke-point oil — vegetable, canola, or flaxseed oil all work well
- A paper towel or clean cloth
- A grill that can reach high heat
Step by step
- Start with clean, completely dry grates. Any leftover moisture interferes with the oil bonding to the surface.
- Apply a thin coat of oil. Using a paper towel, wipe oil over every surface of the grate, then wipe off the excess — you want a thin film, not a visible pool. Too much oil creates a sticky, uneven coating instead of a smooth one.
- Heat the grill on high for 15–20 minutes, lid closed. The oil will smoke somewhat — that's expected, it's the oil polymerizing onto the metal.
- Let it cool completely before touching or using the grates.
- Repeat 2–3 times for a fresh or heavily stripped grate. A single pass is thin; multiple thin coats build a more durable layer than one thick one.
How often to re-season
After any deep clean or rust removal, always. Beyond that, a light re-oiling every few cookouts keeps the layer topped up — you'll notice when it's needed because food starts sticking more than usual or the grates look dry and gray rather than dark and slightly glossy.
We re-season cast iron as part of every deep clean
Your grill leaves ready to cook, not just clean — mobile service across Merced and the Central Valley.
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