I took mine off by gently waving a heat gun around the edge while prying upon the lens, starting at a corner with a small screwdriver. Don't force it, just heat it more.
After a thorough cleaning, I then sprayed the interior with Krylon #1511 Silver spray paint.
To reattach them I used Metro Ribbon Sealer 3/8" x 3/8" that I purchased from the AutoZone.
One 15' box was enough.
Start with the corner lenses first working towards the center lenses.
If it is a coupe, make sure you test fit the verticle chorme pieces on for proper alignment.
They will not fit properly if you don't check this. I know.