I have a huge dark grey modular sofa covered in grey woolly fabric (80% wool 20% nylon to be exact). It wasn't smelling very fresh lately so foolishly I covered it with some white carpet refresher powdery stuff (the type you vacuum afterwards) and now after removing the powder there's stains/watermarks showing everywhere that weren't even there before to start with, or weren't apparent. We don't eat in the sofa so pretty sure they're watermarks but they look really horrible, and I'm not sure how to get rid of them...
... any suggestions please? They're obviously not removable covers but the fabric is stapled to the frame. I found an upholstery stain remover from Tableau but it's quite a small pot and it needs soaking with water afterwards to rinse it; I'm afraid it will make it worse. ....
Thank you in advance