Trade Secret Touch Up System dark brown. This touch-up system is used for professional repairs ranging from nail holes, scratches and cracks to restoring worn areas. Trade Secret Touch Up System Dark Brown is a superior formulation that includes two fill sticks in two similar tones in order to get as close as possible to the original color. The Touch Up Marker is a superior formulation that allows for top coat adhesion on multiple surfaces. The fill sticks are blended from high-grade wax that wont shrink and can be top coated with the Touch-up Marker and the Trade Secret Crystal Clear Finish for Floors.