Just curious why lighter fluid to soak the lock?
Also, there's a lot of bright work on a fin, does most of it come off easily? My long term plan for my fin may be to strip everything myself so that a thorough and proper rust repair/repaint can happen.

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63 220S W111
76 300D W115
2013 VW JSW TDI M6

previously-
73 280 SEL 4.5
86 300E 5 speed
2010 VW Jetta TDI M6