Carlite plaster, one of the finest types of plaster, is typically used in conjunction with other types of plaster. After applying thistle, for instance, you could use Carlite to conceal any flaws in the background.
A paintbrush (approximately 75mm) will suffice. Wet the brush and then wipe away excess water. Using large, up-and-down strokes, paint the corner while directing the paintbrush more toward the wall you are approaching. The plaster is typically quite moist at this stage, so minimal pressure is required.
The finishing trowel is a vital component of any plasterer's toolkit. It permits more plaster smoothing and flattening after application to a wall.
The smoothness is the responsibility of the skim (finish) application. A flawless finish is achieved by applying a skim coat of finish plaster. The skim coat is applied at 2 to 3 millimetres over the base coat. It is not intended to flatten; it is merely a finishing coat.