This painting of an African Couple was done by me long time back when I had just ventured into this art. Franky speaking, painting was and still is my hobby and that time I had no knowledge as to how different mediums work. Now, with experience and practice, I do exactly understand the difference.
You have to be very careful about the light and dark shades from the beginning itself as it is very difficult to rectify work in water colours. Seems to be an easy medium but needs a lot of practice.