Historical clue formulations

• Corrosion signs — 2026-02-16
• Becomes inoperable, in a way — 2025-05-24
• Develops iron 49-Down — 2025-01-22
• Shows signs of disuse — 2024-04-14
• Loses sheen, perhaps — 2022-01-07
• Gets creaky, say — 2019-08-31
• Corrodes, as iron — 2018-08-22
• Undergoes oxidation — 2017-02-21
• Shows signs of aging — 2016-05-28
• Corrodes — 2015-10-28
• Displays disuse — 2014-08-03
• Becomes inoperable, maybe, as an old machine — 2010-11-15
• Oxidizes — 2010-02-10
• Fall colors — 2007-10-24
• Gets corroded — 2007-10-08
• Corrosions — 2004-08-23
• Corrodes — 2004-06-29
• Corrodes — 2003-10-26
• Dirty films? — 2003-06-06
• Oxidizes — 1999-08-17
• Fall colors — 1998-12-10
• Loses limberness — 1995-10-24
• Sits too long — 1995-03-05