I used Kylon Fusion spray paint. It's made to bond to plastics.
The heat vents come out by a small latch on the top right corner, about 2 o'clock hour. You will most likely have to spin the vent to line up the opening for the latch. Once it's lined up just press it down with a small flat head screwdriver and the unit should be free to turn to the left a little then pull right out.
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