Assuming you're asking if vinegar can remove rust stains from fabric:
The short answer is yes! Vinegar is a great rust stain remover. All you need to do is soak the stained fabric in vinegar for a few hours, then wash it as usual. You may need to repeat this process for stubborn stains.
Vinegar is such an effective rust stain remover because it's acidic. This means that it can break down the chemical bonds that make up rust. When used on fabric, vinegar will essentially dissolve the rust stain.