Pre-finishing new wood trim such as crown molding, baseboards, bead board, and chair rails before attaching it to the wall has a number of benefits. Among those advantages are minimizing fumes by working in a well-ventilated workshop or garage, applying the finishes while you stand upright at a convenient work surface, and eliminating the likelihood of smudging painted walls or dripping on interior floors. You can apply multiple coats of stain and topcoat and allow them to dry at your convenience, thus keeping your interior living space clutter free until you are actually ready to install the trim. Nail holes present no problem, because they can be touched up with a wax finishing pencil that makes no mess whatsoever. Add the potential of using water-based finishing projects for easy soap and water clean up, and the entire project goes quickly and efficiently.