I have a cheapo Walmart 3 speed box fan on the end pulling out the fumes, mist, and flying bugs, garage doors are shut. You better wear a full paint suit, head cover, latex gloves, and at the very least a full face respirator, this is the one I got from Grainger, with the baddest toxic chemical 3 part filters they had. It is still not what you are supposed to use, (Fresh supplied air system) but it will give you about 70% respiatory protection, get in & get out quick! I have never painted a car or anything automotive before, and I'm done with it!