Since the paint I plan to use for painting the aircraft is very toxic and regular air filters are not enough to protect the painter, I decided to upgrade my paint booth by installing a positive air supply. I modified a painting mask by installing a 1 1/4″ sump pump tubing instead of one of the filters.
I then routed the tubing outside of the paint booth to a bathroom exhaust fan which I installed in an outside window.
The fan pumps fresh air from the outside through the tubing to the face mask, providing a safe air supply to the operator.
Time: 4 hours.
Leonard's RV-7A Build 