I spent a hell of a lot of time preparing the left wing ribs. Finally all the deburring was complete, and I prepared to prime them. By the time I got all the roadblocks out of the way, it was dusk when I began spraying. Outside. I think what happened is that the relative humidity skyrocketed right as I was priming and caused this failure:
Just completed Page 14-2. Time to date 99.75 hrs.
Previous days included 6/1, 6/4, and 6/6 on which I did a lot of rib fluting.