I designated tomorrow as my day to paint the shop (using Zinnser 123
(interior) White).

As I was doing my final prep tonight, cleaning and covering, I realized
I wanted to paint the inside of the door leading outside too

Aside from its 3x3 panel window (really a single pane of glass, 1/4" I
think), it's a pretty plain door, previously painted.

I am thinking of getting a 1" nylon trim brush for the panels, but I
assume that the rest of the door should be painted with my 3" brush like
it was a faceframe of a cabinet.

I am also planning to put the Zinnser on my door moldings (previously
painted).

Does all of this sound appropriate? The door above has a screen door,
but I assume it would be more appropriate to use an "exterior" paint for
it. Still correct?

Thank you,
Bill