Alumiprep - Alodine - Prime (Akzo-Noble) wing Ribs.
I numbered each rib with a sharpie noting its location (L1, L2, L3 etc). I covered the number with a small (3/8" x 3/8") square of blue masking tape for the priming process. After complete i removed the tape - assembled the ribs, removed the sharpie markings with acetone the just spot primed the bare aluminum spot with a Q-Tip.
