Clean up the coped cuts with a file or sandpaper. A round file works well for tight curves. Pro tip: Keep a scrap of the trim ...

Picture frames and boxes require joining two boards to create a right angle. The cleanest way to do that is cutting 45 degree angles at the end of each board, called a miter cut.

This will give you the proper 45-degree angles on the mating edges of the two pieces in the corners. Before you ruin much more of your expensive crown molding, and your mental health, cut two 1 ...