| Answer | Crossword Clue |
|---|---|
| PATINA | Green film produced by corrosion |
| PATINA | Green film produced by oxidation |
| patinas | A green or brown film on the surface of bronze or similar metals, produced by oxidation over a long period |
| honeycombs | A mass of cavities produced by corrosion or dissolution |
| honeycomb | A mass of cavities produced by corrosion or dissolution |
| rust | comparable coating produced on a metal other than iron by corrosion |
