I just cleaned them with a little soap and water and applied a light coat. It looks streaky and thin, but is not noticeable through the corner lenses. I started light and kept installing them and turning them on to see if they would blink in "amber". Two light coats and you cannot really see the bulb, the amber is gone and it will still blink amber in color.
01 S55 AMG Silver
01 CLK55 AMG Silver