I made final preparations for riveting the outboard rib by ensuring all surfaces were clean and wiping everything down well with MEK. Used the squeezer to set the rivets. Used cutoff toothpick to put sealant in dimple. Picked up rivets that were washed in MEK with tweezers. Wiped off excess sealant and squeezed the rivet. Repeated in a pattern from nose to tail, setting a rivet, skipping a cleco, and setting another rivet. Went back and repeated process until all rivets were done. Used some leftover sealant to dab on shop heads.