It’s humid and windy here in central IL today, so I thought before I did a clear coat on my Bowser Mikado, I’d test to see how Model Master spray lacquer would dry with outside wind vs. inside none. The humidity is pretty high in either area, and the coating is semi-gloss.

With the outside wind (right side), the semi-gloss dried with a super-flat finish. Inside the garage where it’s a little warmer and where there’s no wind, I got the proper finish.
So remember, if you’re spraying a clear coat and it’s humid, do it where there’s no wind whatsoever. It makes a surprisingly big difference!
Darth, did you use a flash when you took the picture? It’s hard to see much difference between the two to me. I can see the glare from the flash.
There are many things that can affect the finish of the paint, from direct sunlight, humidity, cold, pressure, mixture, etc and lacquers dry fast. Were you getting the clear on ‘wet’ in the wind? I’ve found that dryspraying will make any paint dull, which the wind may have been doing to you. lacquers are nice but there are rules that need to be followed. Really watch putting it over enamel paints, unless your going for the wrinkle finish.
I did use a flash. On my screen, the difference is pretty clear, but I don’t know if it’ll be the same on others. The semi-gloss side reflected the flash, and the flat side didn’t reflect anything.
When it went on in the wind, it didn’t go on dry. The track was clearly wet before it dried, and then it became completely flat.