Thanks my friends @eb801 and @michel-verschuere!
My "detail" airbrush is a Badger 100SG, the version with a tiny opening at the top. I admit I don't use it that much, as my Revell Vario (which is a reboxed nice Thayer & Chandler Vega - made by Badger) at its finest settings is sufficient.
I believe the claim that minerals erode the bearing are highly exaggerated. These things fail with use, sooner or later.
I paint at the basement, I have a mobile table that I put near the garage door that I keep open during painting, then, upon finishing, I open a big window at the opposing side, so fresh air is cleaning the room. I usually leave the painted model outside the garage, at a shaded and "protected" spot, to initially dry, for a couple of hours, then bring it in.
Have a nice Sunday, my friends!