Just repainted the interior of my house and have noticed in some areas that there are chunks of debris -- mostly fiber threads -- that must have gotten into the paint and are now stuck on my walls. This is particularly noticeable in one bathroom where semi-gloss was used. They're all over the place -- threadlike fibers everywhere. Is it possible to lightly sand these fibers off and then repaint... will sanding even get them off? We carefully used blue painters tape on the rollers to get off any fibers that may be loose, but then (foolishly?) stored the rollers in the cans of paint until we were ready to paint somewhere else. Do you think this is likely where these fibers all came from?