I would be guessing but i think it's the same as the badges. fishing line and fingers.
Not quite that easy, I'm afraid... This info is from the service manual, so all care but no responsibility if you break something.
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click all pictures for full size.)
Step 1, repeat for both sides:
Step 2:
Step 3:
Step 4:
If you want to de-chrome the car, the better alternative to removing this (given it leaves holes and a scallop in the tailgate) is to have it painted body colour instead, which has been done by a few people.