Blot the stain with cold water
Lay the fabric flat on a clean towel
Apply lemon juice and salt to the stain
Let it sit in direct sunlight for 30 to 60 minutes
Rinse thoroughly with cold water
Repeat if needed
For tougher stains, use white vinegar instead of lemon juice
Wash the clothing as usual after the stain fades
Do not use bleach on rust stains
Check the stain before drying
Air-dry the garment until the stain is completely gone
Use a rust stain remover if the stain remains
Test any cleaner on a hidden area first