Rule number 37 of the "building an airplane" guidebook. Set an expectation for guaranteed frustration. No expectations = low stress. So I went into the shop today fully expecting to block out the primer wet sanding and have the surface ready for final primer. Nope. Nowhere near cured enough with the overnight temps still getting down below freezing here. And watching epoxy cure is not a hobby of mine, so I found some other small tasks to take care of. Still thinking I'll hang the engine next week but maybe not first thing. Meh...