Removing rust: pick your surface
Rust is a rust (iron oxide) stain, usually from metal furniture legs, radiator pipes or damp tools left on the floor. The chemistry stays the same wherever it lands — but the safe way to treat it changes completely with the surface, which is why each pairing below has its own guide.
Not water-soluble
Water alone will not touch this stain; it needs an absorbent, surfactant or solvent stage.
Not heat-sensitive
Temperature is not the enemy with this one; the removal method itself does the work.
Fresh vs dried-in
Rust is not an organic stain but iron oxide bonded to the fibre, which is why detergents do nothing and bleach makes it permanently worse. Mild acid dissolves it — fresh transfer marks respond in one or two passes, while a long-established mark under a radiator or furniture leg needs repeated acid treatment.
Rust removal guides by surface
Rust on a wool carpet
very hard to remove · pro sometimes needed
Fresh lemon juice and table salt; a fabric-safe rust remover as the escalation
Read the guideRust on a nylon carpet
hard to remove · pro sometimes needed
Fresh lemon juice and table salt; a fabric-safe rust remover as the escalation
Read the guideRust on a polypropylene carpet
hard to remove · pro sometimes needed
Fresh lemon juice and table salt; a fabric-safe rust remover as the escalation
Read the guideRust on a polyester carpet
hard to remove · pro sometimes needed
Fresh lemon juice and table salt; a fabric-safe rust remover as the escalation
Read the guide