A colorful way to keep workpieces organized

Project assembly goes smoother when you mark mating joints. Usually that entails simply using a pencil or chalk to scribe matching letters, numbers, or hash marks on adjoining joint surfaces. Those marks disappear in subsequent sanding. But sometimes you need to sand and apply finish to workpieces prior to assembly. At those times, I color-code mating surfaces using markers. The marks will be hidden within the joint.
—Dan Martin, Galena, Ohio