I don't recall how they came apart right offhand, and I am not at home where I can check for you. I did separate mine and shot the inside of the bucket with some silver or aluminum paint cleaned up the lens and shot the outside edge with John Deere blitz black. They look good and you can see them from behind!
If you are doing an absolute correct restore, the outer edge of the lights were either black or maybe a gray. I had one of each...
Cal