Stage Three of Handportrait

Every area of the painting is beginning to develop throug layers of pigment using the medium of pastel. I am wrestling wiht images surrounding Scott's hands. Scott has dedicated his career to aircraft wing fracture detection (saving lots of our tax payers' money & many lives), and I want to incorporate this somehow. His woodworking is also not included and his wife suggest the my rulers could symbolize his carpentry as well as his engineering skills.