I did them just after I got the car. Originally I wanted the green color, then couldn't match. I tried using some really wide vynil tape, but after a while it became dull and scratched up. This, despite a couple years of snowing, raining, gravel, dirt, etc, is actually holding up better than the rest of the car's paint. A true testament to the power held my a single circus monkey
I also sanded all the little logos off and then sanded the entire surface of the lights. Because of this the black has a textured look like the plastic trim aroung the light and stays dull. Thanks to many clearcoats, the red always has a wet look to it, even when it gets dirty
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