Choose your design:
Be sure to find some good quality images and drawing of galaxies in books or on the internet. Print out these designs that you can easily follow on a large scale for your galaxy painting. Remember to pick a design that is not too complex and that you can easily handle.
Make sure that you have all the proper tools like measuring tape, pencils, pens, masking tape, paint and a ladder. You should also have sandpaper and a large drop cloth to prevent paint from hitting the floor.
Try to make as many practice drawings to scale as you can. Use large size paper and sit down and try to draw out your galaxy design that you previously printed out. Remember to keep practicing to perfect your method.
You can use your best sample drawing to scale for use as a template while painting your galaxy on the wall.
Find a suitable location on either the wall or ceiling that you want to make your galaxy painting on. Remember to choose a location that is easily accessible and flat.
Gently sand down the area that you want to make your galaxy painting on. This will remove any imperfections in the wall.
Now using a ruler or measuring tape draw out a large grid on the wall. Be sure to keep each block of the grid to one inch square. This will help you take you print and increase the scale for the wall. Remember to use a pencil while drawing the grid on the wall just in case you make a mistake you can easily erase it and start over.
Depending on the style of galaxy painting you are looking to make, there are different methods to paint it on the wall. You can use a fine brush and carefully follow your template or another method includes using a spray mist to gently cover more surface area of your wall without coating too thick.