glow-in-the-dark paint adds luminescence to most surfaces when exposed to light Glow in the Dark Painting Tips 1. Surface to be painted should be clean0 2.Background color should be light colored or white. If not, apply a white layer prior to painting. 3. Apply at least 2 to 3 coats of paint with a drying time of at least 20 minutes per coat. 4.After every coat, charge up the painted surface with the UV light or Smartphone Flashlight (1-3 mins) and check for uneven areas. 5.It is better to apply more layers of thin coats than less layers of thick coats. Controlling the evenness of the glow paint is not easy with thick coats. Glow Paints are energized by surrounding light (preferably those with UV rays) e.g. Sunlight/LED Flashlight (5 to 10 minutes charge time) UV black light (5 to 10 minutes charge time) and fluorescent light (25 to 40 minutes charge time)