With plastidip I wouldnt bother removing the letters. Justt tape off the area in a square. Spray enough coats like 5. And then peel off the tape. It should pull all the excess plastidip off and youll be able to slowly pull it away from the letters all in one piece with out taking it off the letters. I love plastidip
i did this to 2 challengers....and both times I removed the letters, plastidipped them, then reapplied simply with clear caulk. First car I did it to I had for 3 years that way and plastidip/caulk was still perfect...then I got this '14 and was one of my first 'mods'