I say to myself, completion, not perfection as I see scratch marks that I missed when I was sanding. At this point, I have to hope the paint covers most of it.
As of an hour ago I am no longer a airbrush virgin. After a little paint thickness adjustment and unclogging I put down the first coat of white on the plane (well after a little pre-shading). Looks like its going to need a couple more thin coats before I can mask it off for the other color. I'll be at the line, but I think I might just make it.