I'm looking for a tool that I don't know the name for. I first saw it in Europe, and then I think I saw one in the U.S., but can't find it now in a typical auto parts store. It's pencil-shaped and brush-like with glass fibers (or maybe wire strands) on the end. It works like a pencil eraser to remove small areas of rust before applying touch-up paint. Anyone know what it's called or where I might find one? Thanks!