I finished up the rear spar doubler rivets today. I also attached the hinge brackets. These I did using the 'wet rivet' method. The holes in the steel hinge brackets were cleaned of the powdercoat during the match drilling process, so we have bare exposed steel. That's definitely not good. Not only that, but they will be in contact with aluminum alloy rivets. Dissimilar metals, also not good. So I think the best solution to this is what they call the 'wet rivet' method. Basically I take the rivet, dip it in my rustoleum primer, stick it in the hole half way from the back side to spread a little primer around the shole in the steel, take it out and push it all the way through on the front side to it's final resting place. Primer squishes out around the machine head, but the paper towel makes quick business of that. Then simply squeeze the rivet as you would normally. It'll get a little primer on the squeezer, too, but that's easy to wipe off. I think that's about as good as it can get to protect these holes. And it seems to work alright from what I can tell...
Anyways, here's the work from today. Rear spar pretty much done. Front spar has the angles mostly attached.
