I definitely have an easier time spraying with a spray gun. However, for the pace of the progress / needing to get so much stuff ready at the same point I find aerosols more convenient. Cleaning up spray guns is a pain too.I know about the dangers of 2K but always wear a good mask and since I don't do it very often I don't worry too much. I figure If I can't smell the stuff through the mask I'm not in too much danger but like I said I don't take anything for granted.
The nice thing about using a spray gun is the paint is thicker so goes on with much less orange peel, therefore less wet sanding with 2000 grit and mopping afterwards.
Like you say though, the prep is everything.
(Though there are few tips out there for making your own gun bags like this video
)
The coverage is so much better with a spray gun and the chances of applying too thick are most certainly reduced. Orange peel is almost always going to happen with an aerosol, which is why the wet sanding and the polishing is so important for the next stage.
To be continued