| Clue | Source | Date |
|---|---|---|
| Reacted to acid | Universal | 15 Jun 2022 |
| Rope lassoing display of cowboy skill, mostly getting rusty | The Telegraph Toughie | 05 Aug 2021 |
| Eaten away by rust, say | The Washington Post | 24 Aug 2020 |
| Eaten away by rust, say | LA Times Daily | 24 Aug 2020 |
| Eaten away chemically | The Times Concise | 21 Aug 2019 |
| Rusted | The Telegraph Quick | 07 Aug 2019 |
| Eaten away, as by acid | ||
| Deteriorated | ||
| Erose |