1.5 hrs
Dimpled both topside skins. Was most of the way done when I realized the dimples weren't so great. Swapped out dimple dies, now using the Isham die set. The remaining few dimples look fine. Couldn't fix the remaining dimples by setting again.

Masked and primed the overlap where it was filed down on both skins.
Done with main wing prep, now just need help bucking rivets.