In this guide
A rusted Blackstone top comes back almost every time. Blackstone's position is that rust only forms at the surface of the iron and does not affect the whole metal, so scraping off the top layer gets you back to a plate you can season. Its care guide goes further and says even heavy corrosion can be tackled. The sequence is heat, scrape, oil and abrasive, wipe, repeat until the towel comes up clean, then the full seasoning routine from the beginning. It is an afternoon of scrubbing, and the plate at the end is bare steel ready for oil, which is what a new one is.
The one plate that does not come back is the one with a hole in it, or pits so deep that no amount of scraping reaches a flat surface. Blackstone does not publish a threshold for that, and I would not expect one. A perforated plate is a replacement.
Why a Blackstone griddle rusts
Blackstone's help centre states the mechanism in one line: rust forms on the plate when steel is exposed to water and oxygen, a natural process called oxidation. Its rust blog is more specific about geography, calling out owners who live by the sea or somewhere humid, because the air there already carries the water. Seasoning is what stands between the steel and that air. Blackstone describes it as oils baked into the cooking surface, creating a polymer on the steel that locks out oxygen and water, and calls maintaining those layers the best way to prevent rust.
So rust is a seasoning gap, and gaps open in predictable ways. A scraped or flaking patch exposes bare steel. Water pooling on the plate while it is not in use can, in Blackstone's words, start to eat through the seasoning and cause rust, and a soft cover that sags in the middle is a pool waiting for the next rain. Blackstone's flaking article adds that leaving water on the griddle top may cause rusting, and its warping article says to avoid large amounts of water when cleaning. Cleaners finish the list. Blackstone's care guide says detergents and oven cleaners ruin the seasoning layer and can even cause corrosion.
Every item on that list is the same event: something got through the oil to the steel and stayed wet. Fix the rust, then fix the gap, or the rust returns to the same spot.
How Blackstone says to remove rust
Blackstone publishes the procedure on its blog and in its help centre, and the two agree. The blog version starts with heat. Put on heat-resistant gloves, turn the griddle on and keep the heat high for 20 minutes, because that loosens the rust and makes it easier to remove. Then let it cool and scrape the whole top with a metal scraper until you cannot see any more corrosion. The help-centre version skips the preheat and starts at the scraper: scrape off any rust or seasoning chips with a metal scraper. I would keep the heat step. Cold rust on a cold plate fights the scraper.
| Step | What Blackstone says | Why it is there |
|---|---|---|
| Heat | Burners high for 20 minutes, gloves on | Loosens the rust |
| Cool and scrape | Metal scraper across the whole top until no corrosion shows | Lifts loose rust and seasoning chips |
| Oil and abrade | 3 to 4 tablespoons of cooking oil, then a grill stone, steel wool or medium-grit wet-or-dry sandpaper | Cuts the rust the scraper left behind |
| Wipe | Cloth or paper towels | Carries the rust slurry off the plate |
| Repeat | More oil, wipe again, until no rust debris shows | Rust left in place is next month's rust |
| Rinse | Minimal water, then wipe the top clean and dry | Clears the last grit before seasoning |
| Season | Full initial seasoning, thin coats until dark | Puts the barrier back |
The oil-and-abrasive step is the work. Blackstone's blog says to drip 3 to 4 tablespoons of oil over the surface and scrub it with a grill stone, with steel wool or medium-grit wet-or-dry sandpaper as the fallback if no stone is to hand. The help centre says a small amount of cooking oil and scrubbing at the rusted areas with steel wool, medium-grit sandpaper or a griddle stone. The oil does two jobs. It carries the rust off as a slurry instead of dust, and it keeps the freshly exposed steel from starting over while you work. Then wipe, oil again, wipe again. Blackstone's instruction is to continue until all signs of rust debris are gone. The towel tells you when. Brown streaks mean keep going. Grey means stop.
Rinse off any remaining debris with minimal water and wipe the top clean, per the help centre, then dry it completely. Bare steel and a damp towel is how you make new rust while removing the old.
This is also the one time abrasives belong on the plate. Blackstone's care guide says abrasive scrubbers really only need to be used to remove rust, because they scratch up the whole plate. On a rusted top the scratches are the point, and the seasoning fills them.
Re-seasoning after the rust is gone
The plate under the rust is bare metal with nothing protecting it, so Blackstone's last step is the full initial seasoning, not a wipe of oil. Blackstone's seasoning article: heat on high until the plate starts to discolour, spread a thin layer of oil with tongs and a paper towel, walls included, let it smoke for about 15 minutes until the smoking stops, and repeat three to five times. Its rust blog then adds another 3 to 4 tablespoons of oil wiped over the finished seasoning as an extra protective layer, to block contact between air, water and the plate.
Thin is the rule for every coat, and rust removal is where that rule gets broken most. After an hour with a stone the temptation is to be generous with the oil, and a generous coat never finishes bonding. The seasoning flaking or sticky guide covers what a thick coat does and how Blackstone says to undo it. Blackstone's blog singles out flax oil or extra virgin olive oil for the post-rust seasoning, saying they bond more to the metal, while allowing that any cooking oil works. Use what is in the cupboard. Film thickness matters more than the bottle.
How Blackstone says to store it
Blackstone's rust-prevention article turns storage into four instructions. Cook often, because each use adds seasoning layers. Clean and oil after every cook, with a thin coat. Store properly, meaning out of the elements, or remove the griddle plate and store it indoors. Cover it, with a hood or hard cover and a soft cover, and if only a soft cover is in play, tent it in the middle so water can run off. The tenting line is the one most owners skip. A flat soft cover holds a puddle over the exact surface you are trying to keep dry. Blackstone also suggests a hard cover accessory for a griddle that did not come with a hood.
For a griddle that will sit unused for a stretch, Blackstone's extended-storage article adds more. Clean grease and debris from the main body. Clean the plate and empty the grease cup to deter pests and avoid mould. Add an extra oil layer to stop the seasoning drying out and peeling. In a humid or harsh-winter climate, store the griddle inside a sheltered area such as a garage. Blackstone says the propane tank is closed, disconnected from the griddle and upright on a sturdy surface, and never stored in an area connected to the home or in a living space.
Outside through winter, Blackstone's advice is a weather-resistant cover, a level surface with good drainage, and again a tented soft cover if there is no hood or hard cover. Its blog adds the habit that catches rust while it is still cheap: if the griddle is not used every week, check it at least once a month, because rust is easier to remove at the start than once it covers the whole top. The same blog adds the humid-climate version: a well-ventilated spot, away from bathrooms.
When the plate is actually gone
Blackstone's whole approach rests on rust being a surface event. If the steel is intact under the rust, the plate is recoverable, and Blackstone says so about even heavy corrosion. The exception is a plate where corrosion has gone through: a hole, or pitting so deep that scraping and stoning cannot bring the surface back to something flat enough to season and cook on. Blackstone does not publish a depth at which that happens, and the call is yours with a scraper in hand. A plate that still shows dark pits after two full rounds of oil and stone is worth photographing and sending to Blackstone support before more scrubbing. A plate you can see light through is finished, and the conversation is about a new top, not another afternoon with a stone.
Everything short of that is a Saturday. The Blackstone On The Go 22 review covers a tabletop that spends its life travelling, which is where covers get skipped and rust starts, and the griddles page collects the models on the site.
Common questions
- Can a rusted Blackstone griddle be saved?
- Almost always. Blackstone says rust only forms at the surface of the iron and does not affect the whole metal, so scraping off the top layer gets you back to a plate you can season. Its care guide says even heavy corrosion can be tackled. The exception is a plate that has corroded through or pitted too deeply to bring back to a flat cooking surface.
- Can you use steel wool on a Blackstone griddle?
- For rust removal, yes. Blackstone lists steel wool, medium-grit sandpaper or a griddle stone for scrubbing rusted areas after a small amount of oil goes on the surface. Its care guide says abrasive scrubbers should only ever be used to remove rust, because they scratch the whole plate. On a healthy seasoned top, use a scraper, water and a scouring pad instead.
- Do you have to re-season a Blackstone after removing rust?
- Yes. Re-seasoning is the last step in both of Blackstone's rust procedures, because the steel under the rust has no protection left. Run the full initial seasoning: heat on high until the plate discolours, spread a thin coat of oil, let it smoke until the smoke stops, and repeat three to five times. Blackstone's rust blog then adds one more thin wipe of oil over the finished seasoning.
- Why does a Blackstone griddle rust under a cover?
- Because a flat soft cover holds water over the plate. Blackstone says water pooling on the griddle while it is not in use can start to eat through the seasoning and cause rust. Its advice is a hood or hard cover under the soft cover, and if you only have a soft cover, tent it in the middle with an object so water runs off instead of sitting.
- Should the griddle plate come inside for winter?
- Blackstone lists it as an option. Its rust-prevention article says to keep the griddle out of the elements or remove the griddle plate and store it indoors when not in use. For long storage in a humid or harsh-winter climate it says to store the griddle inside a sheltered area such as a garage, with an extra layer of oil on the plate. Blackstone says the propane tank is closed, disconnected and upright, and never stored in an area connected to the home.