To remove rust stains from carpet (synthetic and wool):
- Apply lemon juice and salt to the stain.
- Flush with water and blot well.
If any stain remains, try the following steps:
- Test a fabric-safe rust remover, such as Bar Keepers Friend Cleanser & Polish; if the fabric is not damaged, apply according to label directions.
- Flush thoroughly with water; blot excess liquid.
- Allow to dry.