The CRX is a short, stubby car. To visually lengthen it, the designers placed the black bump rail at knee height along the car. Putting any graphics on the car in anything but a horizontal line would look pretty bad.
To mimimize the contrast of this rail, mine got painted body color. The concept works, but up close you can see the paint failed. Using some plastic paint to make the regular automotive paint stick to the plastic rail seemed like a good idea, but there was a chemical reaction that has kept the paint soft.
I plan to fix it the right way eventually and welcome some hints on painting this thing the right way.