Base paint-This will be the first layer of color paint and it's usually a darker tone of the final color.For example,if you want to paint light green on your model,your base color would be dark green.
Shading-How well you shade,comes with practice.The more you practice,the better the result.Shading is basically leaving a darker color tone on the edges.Make sure that the top color is vivid.(For example,when spraying white,there will be a lot of instances when the white is a little grayish. Thats because the white coat is not thick enough or the base coat was too dark causing the white parts to look like very light grey parts.)
Blending-This is an important step to blend the darker parts with the original color,and to do so,we need to thin the main color more by adding thinner.Spray it at a distance,and see the base color getting closer to the main color but still remaining its darker tone.