> well in vacuum and microgravity probably
Wouldn't all paint works well in microgravity? If it didn't, I would think you wouldn't be able to apply it to your floor, walls, and ceiling, with the same paint.
Not OP but I’d imagine the big problem with microgravity is not after application but during application. No idea the scale of that problem but obviously open cans of liquid paint are not realistic (not that anyone was suggesting they were)
I think it's hard to say. Water sprayed at a ceiling doesn't congeal into a ball the way water floating in microgravity does.
Paint that would fall to the ground if it didn't stick to anything on Earth, would just be floating around in microgravity. Any dissolved gasses or moisture can usually passively sort themselves out due to their differing masses, but again, not in microgravity.