They stuck together
I clamped it down and started sanding. Immediately the clamp is in the way.
Duh. Super glue and masking tape trick again.
First, I went over it all with the orbital sander and 80 grit.
And then the breaker popped. Darkness. So, I felt around for the battery powered light that's magnetically attached to my tool box, grabbed my head lamp, and made off to brave the basement. Gulp. It's scary down there. I have to crouch to traverse the entire floor, as the panel is in the opposite corner from the stairs.
As I flipped the 20A breaker, I thought.... 'did I turn that sander off before I set it down??'
Nope.
Can you make out that white oval? No harm done, a bit of butchers wax will set that right. Anyway, I sanded. It's not exciting. Kind of zen.
It's flat. Joint is tight.
This is the widest gap:
That's pretty close up.