Storing It and Dealing With Rust If It Shows Up
How you store it matters almost as much as how you dried it. A perfectly dried, oiled pan can still rust if you seal it up wrong for three months in a garage that swings from dry to humid with the season. Storage is the last step of cleanup, not an afterthought.
By now you've washed it, dried it — really dried it, on heat, the way we covered — and given it a thin coat of oil while it was still warm. Here's the next piece.
Storing it right
Don't stack a lid straight onto the pot with nothing between them. Cast iron traps moisture against itself, and a lid sitting flush is basically sealing in whatever humidity your garage is holding that week. I put a folded paper towel or a piece of newspaper between lid and pot in storage. Some people use a chunk of cardboard box. Doesn't matter what — just something that lets air move.
Same rule if you're nesting pans inside each other: a towel between each one.
Where you keep it matters too. A garage in Utah County goes from bone dry in January to genuinely humid for about six weeks in spring, and that swing is when rust likes to start. If you've got a spot inside — even a closet shelf — that beats a shed. Not everyone has that option, I know. If it's garage or nothing, just check on it more often through the wet stretch instead of assuming it's fine because it was fine in November.
Don't store it in a sealed plastic tote. That's the one I see people reach for because it looks tidy — and it traps humidity worse than open air. A cardboard box or a plain shelf, lid ajar with a spacer in there, beats a sealed bin every time.
When rust shows up anyway
It will, eventually, for most people. Mine has. That's not a failure, it's just cast iron being cast iron in a state that runs dry air half the year and swamp-adjacent air the other half.
Here's where I plant my flag, and I mean it: rust is fixable. This is a hill I'll stand on when someone brings in a pan from a DI run looking sad and orange around the rim, ready to give up on it. A rusty cast iron pot is almost always a good pot underneath. A warped aluminum camp oven is a different problem and isn't fixable, but that's another lesson. If it's rust, you're fine.
Steps, plainly:
- Scrub it back to bare metal. Steel wool, some elbow grease, a little soap and water while you're at it. Don't be gentle here — you want the rust gone, all of it, down to gray metal. If it's bad, this takes a while. Sit down, put a show on.
- Dry it completely on heat, same as always. Rust started because of moisture — don't reintroduce it the second you've fixed it.
- Re-season it. Thin layer of oil, into a 400-ish degree oven upside down for about an hour, let it cool in there.
- Do it two or three times if the rust was bad. One coat after a full strip-down usually won't get you back to the dark, slick surface you had before.
I ran this exact process on my own pan after I left it wet on the counter overnight during a bad week — flash rust by morning, in our dry air, which tells you it doesn't even take humidity, just neglect and a few hours. I've told that story in probably every class I've taught, because it's the one that sticks. Three full reseasonings later it was fine. Better than fine, actually.
A word about "ruining" it
People treat rust like a death sentence for the pan and a bad cook like a death sentence for dinner, and neither one usually is. Jeremy once "helped" by dumping half a chimney of coals onto a lid when I wasn't looking, trying to speed things along. The ham underneath came out completely fine. The green bean side on the same rack turned into something charcoal-adjacent. We still argue about whether that was his fault or the recipe's — his, obviously — but the point stands: even a genuinely bad heat mistake didn't ruin the pot. It ruined dinner for one dish. The oven was fine the next morning, and it'll be fine after rust too, as long as you deal with it instead of ignoring it.
That's really the whole message of this module. Cleanup and storage aren't the interesting part, and they're not why anyone signs up for a Dutch oven class, but they're the actual skill that decides whether you use this thing fifty times or once.
Before next time: if you've got an old Dutch oven sitting in a garage somewhere with rust on it, this is your excuse to bring it in — we'll strip and reseason it together in class.