Historical clue formulations

• With 44-Down, go out with a bang ... or a hint to 16-, 21-, 29-, 34-, 46- and 54-Across — 2025-04-02
• Cross the line, say — 2023-06-11
• Lacquer, e.g. — 2023-03-26
• Do away with, like a 1950s car feature? — 2011-12-06
• Maze goal — 2004-04-13
• Surface coating — 2004-02-21
• Close — 1995-05-12