| Clue | Source | Date |
|---|---|---|
| Kind of coating applied to metal | New York Times | 08 Aug 2026 |
| Corrosion-inhibiting | USA Today | 18 Mar 2017 |
| Corrosion-inhibiting | ||
| Corrosion-preventing | ||
| Oxidation-inhibiting | ||
| Corrosion-preventing | ||
| Like some car wax | ||
| Like some protective coatings | ||
| Erosion deterrent. |