I agree, depending on what you are painting i would suggest the following. if it is a wide area, use a wide soft brush, make sure that the brush is 150% claen, any color left in the brush fr the previous color will normally come out at the worst moment. second thing, keep all the brush strokes the same way, third thing, use as few strokes as possiable that will help with the smoothness. hope this helps, and good luck, great results are possiable with alot of patence!!