I removed the aft seat floor assemblies F-742-L&R by drilling out a few blind rivets from the quick build fusalage. I checked all the edges and holes to make sure there were no rough edges. Next I thoroughly cleaned the floor ribs and fusalage skin in preperation for primer. I used a Sherwin Williams eching primer in spray cans and sprayed the ribs and floor. I prepped the aft seat floors and primed both panels. After drying I clecoed the aft seat floors in place and riveted the floors to the ribs using LP4-3 blind rivets.