Hmm. In two words, Yes and No.
I tried this with a PDC 300 meter - the 3-meter face...
Took some Day-Glo paint (that Neon UV light stuff) and it WORKED but it won't "stick" well and tends to "weigh" the meter needle if you use too much paint to "dot" the tip.
The effort works but too much paint or if you bend the needle trying to dab on paint, the drag on the face from it - will have an affect of the readings.
The UV light shining on it at night made a wonderful display of motion - but the plastic cover tends to shade some of the UV light from reaching the paint than to use it without the plastic protective bezel panel.
Hey, to me, it was worth it. Got a few laughs from the effect it has while using it when you have friends over to talk and chat on the radio.