Prep first
Before you start
- Find the cause first: where the color is, whether it's slimy or hard, and whether many items are affected.
- Pretest any remover on a hidden area before you use it on the visible wall.
- Don't use chlorine bleach on an orange or reddish-brown mark until you know it isn't iron.
- Wipe with plain water before trying anything stronger.
Orange and rust-colored marks on a wall come down to iron from water or rusting metal, while pink slime in a bathroom is a bacterium that needs its own approach. Painted walls can't take heavy pressure or much water, so whether the surface is paint, wallpaper or brick decides the cleaner you can use. Light wiping tends to take a recent mark off, while an older one might only fade and need a stain-blocking primer before you repaint.
Orange stains on bathroom walls call for a light touch, because hard scrubbing can wear through the paint. A red stain on a wall that's brick or stucco outside needs its own product, so identify the surface first. If a pink stain on walls keeps returning in a damp room, cleaning alone won't fix it.
Before you start
What walls can take
Use with care4
- Water
- Chlorine bleach
- Solvents (alcohol, spot removers)
- Scrubbing and abrasives
Avoid1
- Soaking
6 items
What you'll need
Tap an item to get it on Amazon, or tick what you already have.
- Soft sponge or clothfor gentle wiping with plain water (opens Amazon)
- Mild liquid detergentfor the second wipe, when water alone leaves a mark (opens Amazon)
- Clean dry clothto rinse, dry and polish the wall
- Rubber glovesfor any rust remover, since oxalic acid is poisonous (opens Amazon)
- Oxalic acid crystals, with Whiting or talcum powderonly for a set rust stain on tile or masonry (opens Amazon)
- Heavy-duty cleaning compound high in TSPonly for fresh rust on ceramic or plastic bathroom tile (opens Amazon)
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5 steps
Step by step
Step 1 of 5
Find the cause before wiping
Look at the color and texture first. Orange to reddish-brown hard marks are usually iron from water or rusting metal, slimy pink-red marks in a bathroom are usually a bacterium, and blue-green marks near fixtures come from copper in corrosive water. Check whether one spot or many areas are affected, and look for a dripping pipe or rusting metal nearby.
Step 2 of 5
Test a hidden spot first
Choose a corner or a spot behind furniture that nobody sees, and test your cleaner there first. Let the test spot dry and check it in daylight before you go further.
Careful. Rust removers are strong acids and dye removers can strip color, so never skip this test.
Step 3 of 5
Wipe with plain water
Plain water is the first cleaner to try, so start there. Wring a sponge or soft cloth until it's barely damp, then wipe the stain in small circles and check the cloth as you go.
Tip. Use a non-abrasive sponge or cloth so the surface stays intact.
Step 4 of 5
Lift what's left with mild detergent
If water alone leaves a mark, add a little mild detergent to clean water and wipe it on with a clean cloth. Rub gently and keep the mix light.
Step 5 of 5
Rinse, dry and check the wall
Rinse with clear water to remove any soap, then wipe the wall dry with a clean cloth. Polish with a dry cloth and check the mark in daylight; if it's still there, repeat the wipe and rinse before anything stronger.
If you'd rather buy than mix
Best products for orange on walls
Choose a heavy-duty cleaning compound high in TSP only for bathroom tile, and an oxalic acid rust remover only for set stains. Read the label for painted or masonry use before you buy.
Amazon Basics Microfiber Cleaning Cloths
How we picked these: each product is made for this type of stain, its maker doesn't warn against using it on walls, and its directions fit the steps above.
Finished the steps? How does it look?
Nice work. Let it dry completely and check it again in good light. Here is what done looks like:
How to tell it's really gone →A faint mark usually needs one more round, not a stronger product.
Heavy buildup usually takes more than one round.
Heavy or long-standing buildup →When to call a professional →How to tell it's working
On a wall, the color should lift onto your cloth with each light pass, and the paint should keep its sheen once it's dry. If the finish looks dull or rubbed, you've pushed too hard, so ease off. If the color stays put after two gentle rounds, it's set and the old-stain section is next.
What changes for yours
Adjust for your walls
Orange on walls
Orange to reddish-brown marks on a painted or plain wall are usually iron from water or from rusting metal nearby. Look for a dripping pipe, a rusting fixture or a damp spot near the mark first.
Work through the plain water wipe and the mild detergent wipe, then rinse and dry the wall. If the color stays, it has set into the surface, so move to the set-in option rather than scrubbing harder.
Orange on bathroom walls
On ceramic or plastic tile walls in a bathroom or laundry, a fresh iron stain can take a heavy-duty cleaning compound that is high in TSP (trisodium phosphate). Put it on with a damp cloth or pad and rub the stain until it's gone.
Rinse thoroughly, wipe the tile dry and polish it with a dry cloth. Keep this compound off painted bathroom walls, since painted walls can't take heavy-duty cleaners.
Pink on walls
Pink-red slime on bathroom walls is usually the bacterium Serratia marcescens, not rust, so the rust steps are the wrong tool. Start with the plain water wipe and then the mild detergent, rubbing gently on painted walls.
Rinse, dry the wall, and keep the area dry afterward. If the slime comes back on the same spot, check the wall for a leak or a damp corner.
Brick or stucco outside walls
On brick, new light stains respond to 1 pound of oxalic acid mixed in 1 gallon of water, scrubbed with a stiff bristled brush. Old, dark brown stains need a peracetic-based cleaner mixed 1 part to 4 parts water, brushed or sprayed on, left a few minutes, then rinsed thoroughly with a hose.
Protect your eyes and hands from that cleaner and don't breathe the fumes. Rinse thoroughly, then leave the wall to dry before you judge the color.
Heavy or long-standing buildup
Old orange marks that have dried into the wall are the hardest case, and they don't lift the way fresh ones do. Start with the plain water wipe and the mild detergent wipe, since a mark that comes clean after a wash may not need anything more. Check it again in daylight, because a dry mark can look lighter than it really is.
If rust has set into tile, masonry or another hard surface, mix oxalic acid crystals into hot water with enough Whiting or talcum powder to make a soft paste. Spread it over the mark, let it dry completely, then scrape it off and rinse, repeating as needed. Keep rubber gloves on the whole time and test a hidden spot first.
On painted interior walls, don't keep scrubbing: wash, then try a mild detergent and a gentle rub with water, testing a small area first. If the stain still shows, seal it with a stain-blocking primer, using one designed to hold out water stains for water marks. Some penetrating stains will stay faintly visible, so repriming and repainting is the realistic finish.
Vinegar, baking soda, peroxide and more
Do home remedies work on orange on walls?
Most home remedies in circulation are built for fabric, stone or bleach, so only a few fit a wall. Plain water and a mild detergent are the gentle choices that suit painted and tile walls. The rest aren't a good fit for a wall, so skip them.
Skip5Avoid1
What makes it worse
Mistakes to avoid
Don't use chlorine bleach on orange marks
Chlorine bleach sets and intensifies rust, so an orange or reddish-brown mark will look worse after it. If you have already used bleach on it, rinse the area thoroughly and start again with the plain water wipe.
Don't bleach pink slime as if it were mildew
Chlorine bleach is listed for mildew only, and pink-red bathroom slime is usually a bacterium. Clean it with the wipe and mild detergent steps instead, then keep the area dry.
Don't handle oxalic acid bare-handed
Oxalic acid is poisonous and must not touch your skin, so wear rubber gloves for the whole job. Rinse the wall with clear water once the mark is gone so no residue sits on the paint.
Don't jump to acid before the gentle steps
Oxalic acid and trichloro-melamine compounds are for heavy rust that survives the mild steps. Starting with them can dull a finish that plain water would have lifted.
When to call a professional
Iron on a leather or suede wall covering, or on a paper-faced wall, is a job for a professional cleaner, so don't experiment there. If an old mark has soaked into the wall and won't lift, a paint store can help you match a fresh coat, and grasscloth may need a specialist.
Questions
Is an orange stain on my wall rust?
Usually, yes. Orange to reddish-brown marks are most often iron from water or rusting metal. Check for a leak or a rusting fixture nearby, then start with a plain water wipe.
Why does my bathroom wall have pink slime?
Pink-red slime in bathrooms is usually the bacterium Serratia marcescens, not rust. Clean it with a plain water wipe, then a mild detergent, and keep the area dry afterward.
Can I use a rust remover on painted walls?
Wash the stain first and try the mild detergent before anything stronger. If the mark has set, use the set-in option, and pretest it on a hidden spot first.
Why does the orange mark keep coming back?
A mark that returns usually points to the water or rusting metal behind it. Find that source and fix it before you clean the wall again.
Can I clean rust off a wall with vinegar?
No. Skip vinegar as a shortcut; it is also unsafe on cement grout and natural stone. It is also unsafe on cement grout and natural stone, so keep it off those surfaces.
What works on red stains on outdoor wood walls?
Stained wood walls, shingles and shakes need a paste: mix 1 part sodium citrate, 6 parts water and 7 parts glycerin with Whiting to form a thick paste. Spread it until it dries completely, scrape it off, and repeat as needed. For wood siding in general, see our Siding, Roof & Exterior guide.
How long should I wait before washing a freshly painted wall?
Hold off for about two weeks, since a new coat is still hardening and water can alter how it looks. Dust it with a dry cloth in the meantime, and save the damp cloth for after that.
Will cleaning take the shine off flat or matte paint?
It can if you're heavy-handed, so keep the cloth just damp, use light strokes, and test any cleaner on a hidden spot before you go over the mark. A matte finish shows rubbing quickly, so stop as soon as the paint starts to look different.
Can I clean an orange mark off wallpaper?
Only if the paper is washable, and even then go lightly. Use a barely damp cloth, skip abrasive cleaners, and dry the paper right away. Some textured papers can't be wet at all, so test a hidden corner first.
Should I clean a wall from the top or the bottom?
Bottom up is the safer order, so drips run over wall you've already finished instead of streaking clean paint. Rinse your cloth often, since a dirty cloth just moves the mark around.
Orange on other materials
Other stains on walls
Start from the bigger picture
How we know this
Every method, amount and warning here comes from university extension services, industry bodies and product makers. We read them, check every step for unsafe combinations and changed amounts, and write it up so you can follow it.