I take classes often to improve my brushwork technique. This method below is carefully layering color so that the under painting continues to show.
You start with a large brush - size 8 flat - and as you layer the color you go to smaller brushes such as a 4 or 2 flat.
The focal point has sharp edges and the color intensity is pushed - again -while keeping the under painting. At the end is when you focus the directional strokes to create form and with the right color and value.