1.) Put headlights in 250 degree oven for 10-15 mins, Just enough to get the glue soft were you can pry the two halves apart (you may need gloves)
2.) Once apart there are two small screws that hold the bezel to the front lens ( at least on Gen 4)
3.) I scuffed the chrome with steel wool, Fine scotch brite and primed with a gray spray primer
4.) Get color matching paint same as car or any color you choose, Clear coat and reassemble
If you have any questions feel free to message me, Hope this helps