Hey Leslie!
I haven't done Radium Girls, but we did use the Rosco glow paint for Seussical. Yes, we used black lights as well as used other color materials when we made the fish for under the water. The color was strong and I am trying to remember what else we did. But that glow paint shows up really well! It is work the price you pay for it.
That's about all I can help with. It's the only time I have used glow paint, but Radium Girls is also on my "to do" list yet. Let me ask a friend of mine who has done this show. I saw it but never asked what they used for the glow.
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Natalie (Saunders) Dommer
Pasadena Memorial High School
Pasadena, Texas
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