For "microfibbits" Loew-Cornell makes some nylon paint brushes. Various stores (Hobby Lobby and Wal-Mart) sell them in packs of 3 (3", 2", and 1") for about $4. They come in two colors that I know of, White #1170 and Brown #1177. They white ones can be easily marked with a permanent marker. The bristles are fine and pointed.
Sort of in a rush, going fishing, will post other "odd" materials later.
Chuck