Above are three images of hand held electric erasers. The price of these range from $40 to $100 and can be found at Office Depot stores. An elongated eraser is inserted into the barrel of the device. It is little more than a lower rpm electric motor with a hand grip. Pressing the trigger or switch on side of the barrel will start the rotation of the eraser material. Eraser material has a flat end which is placed onto the 1/8th inch guide mark. Abrasion of eraser against surface creates burl-swirl.

Starting at the back corner of your metal panel, turn on the electric machine eraser.  Keep your hand as level as possible gently touch the panel.  Carefully place your swirl marks at consistent 1/8 inch increments across your entire panel just by touching the eraser to the panel.  After about 2 rows you will need to clean your eraser by letting it spin clean on a manila folder (this just takes a couple of seconds).  Continue this process on all your fuselage panels until complete.