Trade Secret Scratch Remover dark. This scratch remover for dark woods professionally rejuvenates finishes and prevents cracking. Trade Secret Scratch Remover for Dark Wood makes it possible for you to avoid costly, time consuming and toxic refinishing jobs. Simply wipe it on, then wipe off the excess and restore the pieces to their original beauty. This product contains no harmful propellants or CFCs, restores furniture to the original beauty, protects against spills, hides superficial scratches and defects on furniture, allows no wax or sticky build-up, and produces a permanent repair.