photos, quoted text and technique courtesy of steve6225
I remember [reading] a couple of threads where people were wondering if the taillight inserts were removable for painting, [wrapping], etc.
I had a couple of minutes today, so I gave it a shot. Not only are they removable, but they are very easy to remove.
They [snap into] two black plastic [retaining clips that are part of the mounting hardware] used to attach the taillight to the car.
I used a thin plastic trim removal tool and pried the insert out away from the taillight. Start at the inboard edge and pry it out, slide the tool along the top and give it a twist when it gets tight. The insert will pop right out of the first clip. Continue along the top and twist again to pop out the second clip.
Not really a press fit, more like a snap, they click into place when you reinstall them.
Great job Steve! Thank you for posting. To see all of the color codes see my Paint section.