Was able to get the second coat on this afternoon. Weather has been cooperating.
Passenger side:
Driver side:

I am actually pretty happy with how smooth the primer is laying down, considering I am using a 1" brush for all the cubby hole work, 1" brush and 4-1/2" nap roller for the wheel wells. The second coat really solidified the slightly translucent spots. I went to back with some small hobby brushes and got some of the really tight spots after the second coat tacked up. I am going to add a third coat tomorrow, let it sit up a day or two, go back with the small brushes and hit any bare/thin spots.
I am pretty sure I am just going to brush paint the cubby holes. You can spray them, and I have before with a body tub on its side, but it is a PIA. Hell, the way the nap roller is working I might go ahead and brush/roll the fender wells too!!!
Anyway, pretty happy with my primer job so far, should really help protect the metal, and it looks a million times better already IMO. Only bad part, after I paint these areas, will only be about 25% complete with the bottom!!! Pulling the tub off is definitely the faster way to do this, but I wanted to give this way a go.
That's it for now.