Don't do as I did by not giving serious though about the effects of casual body work, primers and finish coats. For a quick coat of primer on a fender etc. I would hold a shop rag against my face, for big applications I'd upgrade to a near worthless paper mask. Do wear a mask even hand sawing or buffing a small piece in a vise, sweeping the floor ( mask on) and do hose the garage floor clean often. Forty five years later it has, caught up with me. Sucks to have coughing spasms when you're trying to have a conversation or laughing and when it gets bad enough, have to breath into a wet hot wash cloth to calm the coughing spasms. Then there's the Rx inhalers even with insurance are costly but do help.....some. Everyone has cleaned parts (and our hands) with brake cleaner, lacquer thinner etc. Skin tissue absorption has serious health consequences too. Keep in mind that both lung & organ damage are irreversible ... Period !