When people think of glow in the dark items they usually think of the cheap novelties, green in color, and they glow about two minutes. Well things have really changed. Modern glow pigments can glow for over 12 hours. They also come in 8 different colors, and will absolutely take your breath away.
The glow powders and paint stack up as follows as far as glow time. Green glows 12 hours and is the longest. Next is Aqua “which I recommend for this project’s stars” it glows 10 hours. Blue, Purple, Yellow, Orange around 6 hours. White around 2 hours and Red glows around ½ an hour.
This is what you will need (besides a little bit of artistic aptitude). I reccomend you take your time and try not to rush this project. Do a little at a time. It can take a little patience, but the reward is great.
Before you start, take a look on the net and see what the night sky actually looks like. This will help greatly.
Materials:
1) glow in the dark water base paint (for a room 12’ x 12’ it should take about a quart.)
2) round regular bristle artist paint brush. (I have also heard of people using a sponge. Just make one about the size of a quarter and one the size of a dime cut them in irregular shaps.)
3) ½ inch masking tape.(To grid off your areas).
4) Ladder or step or something that will allow you to reach the ceiling easily. (I do mean easily. This can take a couple of days if you take your time.) Another great way to reach the ceiling would be to us those plastic milk cartons. You know the ones that are a box people use to store albums in. ( If you are not that old, go to the store and ask the clerk. Buy a few, (they are cheap), and then place a couple of boards from one crate to another. This will let you walk on them. It will give you a foot or so of elevation.
5) If you want to add planets you need round cardboard spheres from the craft store. Different sizes. White spray paint. And an ounce or two of each of all the colors of glow paint mentioned above. Also, some fishing line to hang the planets from the ceiling..
6) I recommend you buy a black light. Black lights are rich in Ultra Violet light which really makes the glow paint glow like crazy. It also helps when you are painting the stars on the ceiling. So you can see where to place them or your comets.