The paint isnt UV reactive, and none of the colors that it shifts between are really (in my opinion) going to be affected by the UV.
It's more likely that you'll only see the reflections of the purple UV lights in the paint. You could always try it to see, maybe I'm completely wrong.
**EDIT** I've emailed PPG to ask about UV and the Harlequin paint.
I really dont know anything about the Orbital LCD's, so I cant comment on that.