Methods for verifying calibration points against mark lines on workpiece surfaces are disclosed. Other embodiments including related systems are also disclosed. A material removal component may precisely remove extraneous material from a workpiece when calibration points of the material removal component along a predetermined trajectory are aligned with a mark line upon a marked surface of a workpiece. The marked surface of the workpiece may be disposed opposite of the material removal component. By employing an optical device aligned with the material removal component, calibration points may determined along the marked surface of the workpiece and verified against the mark line. In this manner, the extraneous material may be efficiently removed while minimizing rework and/or destruction of the workpiece.