Josue, Welcome to the Forum. You've done one really fine job on this model. It is hard to believe that it was brush painted. If I were you .I would, if possible invest in a decent spray booth. There may not be a lot of over spray when you use an air brush. But What little there might be and the fumes will be quickly removed from your living environment. And they make some with a dryer type hove and a vent to fit in your window opening. When you are done put it away in a closet or someplace. Looking forward to seeing more of your work. Be Well Gator