I do a lot of spray painting (rattle can) for my relays. I've been doing that for many years and move about 50 feet from my daily driver. Well I washed my daily driver and noted every thing is covered with very fine particles of that spray paint.
I'm going buy a small paint booth which has fans and filter. I will use it in my garage and vent the filtered air out a window. Another thing I could do it put a car cover over the car. But I'm thinking the booth will help keep that paint out of my lungs.
Now removing that over spray is a real problem. Using IPA softens the over spray an leaves a thin film of paint. On the windows a razor blade works fine and then using a scotch brite pad with window cleaner. I think the only thing to do on the paint is to use rubbing compound.
I was under the assumption that the air born paint would dry before it landed on anything. Just a warning even using a rattle can, better use some sort of mask to prevent any paint in your lungs.