In my cleaning frenzy, it seems what I removed was actually some kind of anti-glare treatment, since now there are all kinds of reflections and shadows on the gauge cluster that weren't there before. Oh well.

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1985 380SE Blue/Blue - 230,000 miles
2012 Subaru Forester 5-speed
2005 Toyota Sienna
2004 Chrysler Sebring convertible
1999 Toyota Tacoma