I would assume foggers to contain aerosols that will act as paint contaminants. Wait time would depend on the fogger manufacturer. What I might do in your situation is have the vehicle clean and ready to spray, then cover it with a plastic car cover from your paint jobber before using any area pesticide. Then, after the time specified on the fogger label, you might be able to pull the plastic and shoot the vehicle. But, if bugs are that huge a problem, you are going to get them in your paint, because the solvents in paint attract bugs.