I think this is the info we are looking for. If I would be you, I would wait for Siroxx. He also has like a gun airbrush, and he will know if mini gun is not over kill for you work.
If I am not mistaken! he uses this airbrush
137 pounds. You can get it in states as well. I don't have a clue where you live.
https://www.air-craft.net/acatalog/Mr-Hobby-Airbrushes.html
I am just thinking outloud so don't be harsh on me. But he will know if mini spray gun is overkill for your work. I don't even have a clue if you can clear coat with that airbrush... -.-