This is only an idea, but an advantage could be that you don't have to wait for it to dry and disadvantages could be that you don't get as vivid colours?
Answer:
It's called the circle of fifths because each key signature is separated by the distance of a fifth interval (for example: C to G on the circle above represents a fifth). Now move one space to G, the next key. You'll notice in the outer ring of the circle that a new sharp (teal box) comes along with it.
Explanation:
