Deburred all the rudder stiffner holes and associated holes in the rudder skin. Also dippled the stiffners and scotbrited the surfaces to be riveted for primer. Used the DRDT-2 C frame to dipple the stiffners versus the hand squeezer in the vise method. Both work well, but the -2 is more stable, of course. I still need to dipple the skins and then I'll be ready to prime per the plans.
Deburring with the end of the deburring tool with my fingers. Just a very light twist is all.
Scuffing the rivet line prior to dippling (the dipples tear up the scotchbrite)
