66 Dart speedometer lens paint

The plastic lens/speedo cover that I'm putting back in my '66 Dart needs the numbers touched up in a few places. Anyone happen to know what paint type the factory used, acrylic or enamel? And also, is there an off the self paint that is a decent color match...such as Testers, HiPoParts florescent white needle paint, etc.? Thanks in advance!

-Phil