So, we have sprayed an oil-based primer, finished with the sanding, smoothing, and filling. The trim has been sprayed (if possible) with two coats of trim paint, and we are ready to paint the walls before finishing the project with the ceiling. After this, we must decide between using an airless spray and a paintbrush. An airless spray is mostly dependent upon how properly contained the area can be. We enjoy using the airless paint sprayer because it gives you optimal results, a flawless look, and a brush-mark free finish. Unfortunately, it is not possible for every home. However, do not worry if we must use a brush, our crews are master painters. They know what to add to the paint, what tools to use, and how to use them to prevent brush marks.