Hi, I have the same car and removed all trims before i repainted the car las year.
So start by removing the roof rail rubbers (the rubber that the side glass seals against when up, this should just pull out of the channel it sits in) once removed this will expose the screws that holds the trim...
Hi,
My 68 New Yorker is factory Mist Turquoise, i have recently had it repainted and it is the most stunning color.
I would never change any car from it's original color no matter what.
You will be glad you kept this color.