I do simple case mods. I did what you want to do but with copper paint for a black and copper theme. Since it is a plastic part do not use any standard spray paint. The chemical solvents in the paint will eat into the plastic and ruin it. I used Tamiyama silver leaf spray paint and then clear cloat. Both are made for plastic. The silver leaf also makes an excellent undercoating for other metallic paints. It gives the other metallic paints a very nice depth. The paint is available at better hobby shops and on line. No problems with heat.
Interesting UV paint. Go for it and let us know what happens.