You guys are missing a technique to fix a "factor " only a few pointed out.
You have to get some movement of the skin in order to drive the rivet. This will often lead to a depression like witnessed in many of the photos.
First thing with panel distortion are using rivets that are too hard. Forming the shop head increases the shaft diameter to the extent that it distorts the skin.
But you can still get the depressions when using softer rivets, The fix - taught to my by "old timers" from Lockheed, Northrup and North American who started during WWII, was to take a "fresh" or soft rubber mallet, back the shop head with a bucking bar, and starting light, working up in force, tap the outside surface of the skin and "draw" up the depression from driving the rivet. As always, keep things clean!
Boeing Engineer, Will Taylor, son of Don Taylor, wrote extensively about gluing for structure. First thing is the assembly HAS to be designed for this approach, almost all homebuilt designs are not, and, Second, the quality control/methods and equipment necessary to obtain the benefit are not obtainable at the typical homebuilder's budget. Without either of these points, the structure will be less than can be obtained by standard assembly techniques - i.e., riveting w/o adhesive.
Before you register your objection, there are many areas of a design that are "overbuilt" for expected air loads because experience has taught the designer that the 'risky" loads come from ground handling, etc. so, riveted trailing edges and the like may not see loads that bring the compromised strength into issue.