I'll start.
1) When I polish the car, I notice the grime beneath, between & behind the Carrera script on the deck lid.
I just use a corner of the MF towel to get in there. I have considered getting a Q-tip, but have resisted each time.
The narrow swooping alleyway of Toledo after the "e" is particularly nettlesome.
2) Every time I get out of the car, I notice ancient grime around the hinges front doors, particularly on that upper door ridge to the right of the driver's mirror.
Today, I finally cleaned that area. Came perfectly clean with a few seconds of Meg's polish.