Woodwork requires a few techniques of its own to help make light work of painting it.
As with all painting, try to start at the top and work down, painting with light, even strokes and feathering the edge of the wet paint as the brush empties. Recharge the brush and work back into the wet edge.
Never try to paint over an area that has partially dried, as the brush will leave unattractive marks on the surface. The base of skirting boards can be a trap. Always use a shield – a bricklayer's bolster or piece of metal or stiff cardboard works well. Hold the shield into the base of the skirting and paint down to it, moving it along as you go. Even if you have no carpet to protect, it will stop the brush picking up dust and grit from the floor.