| Clue | Source | Date |
|---|---|---|
| Rubber eraser, for one | LA Times Daily | 21 Jul 2018 |
| Rubber eraser, for one | The Washington Post | 21 Jul 2018 |
| Rubber eraser, for one | ||
| Carpenter's rasp, for one | LA Times Daily | 28 Dec 2017 |
| Carpenter's rasp, for one | The Washington Post | 28 Dec 2017 |
| Carpenter's rasp, for one | ||
| Rubber? | ||
| Erosive agent | ||
| Rubber | ||
| Tool for scraping | ||
| Scraper. | ||
| Friction agent. | ||
| Grater. |