Replaced temporary labels on blue tape with proper Klein wire labels. Vacuumed up swarf from fuselage nooks and crannies. With fear and trembling, tested SANDING the residue of the 20 year old protective film from the flaps and ailerons. Started with 320 - yes, it leaves swirls, but it cuts the crud, and leaves a nice matte finish, that 600 grit further refines. I'm going to use this on the TOP of the control surfaces before First Flight.