One of the biggest problems to overcome when using a brush to paint areas is how to avoid runs in the final finish. This is one of the differences between the skilled painter and the average person who carries out a bit of decorating.
With the increasing high cost of paint it can be disappointing when someone takes the time to paint by brush only to find unsightly runs in the finished product.
Good brush painting is a skill that cannot be learned quickly and only experience produces the first class results,
Good results can be achieved by the simple technique of not overloading the brush with paint and by using light constant and consistent brush strokes will help reduce runs and: Always end on the upward stroke.