Use a pipette or syringe to slowly put drops of paint on the glass within the outline. Use a pin or toothpick to remove any air bubbles you may find.Now, use your brush to carefully fill the outlines with the desired colors. If you are painting a large surface in one color, you can use a sponge to spread the paint in a uniform manner. You might need to add water if you find the paint too thick.Use rubbing alcohol to get rid of any mistakes.
