I wet-sanded all the orange off, and it's white (light grey) now. This white coat will go down as a final layer before the colour coat. The base-coat (orange) sprays a little differently than I've experienced in the past, so that was more an experiment in application and colour, than anything else. I used to paint much more often in the past, but automotive paint changes quite frequently (chemicals, ratios, character, etc.), and it takes some warming up to get it "right" if you've not sprayed in a while (does it gloss out early, late, what is the "run" threshold, can runs be painted out, how quickly does it flash, how effective is a retarder, etc). Also, the orange covers the lighter coloured sealer better than over the darker grey.
I'm trying to be as cautious as possible being this is the end-game on the bodywork. I could easily hand it off to someone else, but after doing everything thus far, I can't see myself handing this last step off to another person.