I hope I'm in the right group for my question. I figure sewers know a lot about fabric. So, I'm wondering why I see staining on my swags/jabots (off white) and on my white chair. This is a living room so there is no food. The stain is orange and looks like rust. Would a fabric rust? The stains are usually linear, meaning they look like a line rather than a spot. I can't imagine what would cause this so I don't know how to avoid it. It's been happening for years.
Can anyone help tell me what this is and why I have it and then what can I do to avoid it.
Thanks, Myrna