I have sprayed a bunch, four airplanes and my HP-18. Used acrylic enamel on the glider, Imron on the RV-6 and PPG base clear on the RV-10 and Rans S-20 and a German base/clear on the Reno Racer I was crew chief on. Was a good boy and used positive pressure on most of them and a good cartridge filter on the rest.

What got me was sanding carbon fiber. On the Reno Racer I built a complete new nose bowl and several other parts out of carbon. Just a dust mask for most. Well that got me pneumonia like symptoms from dust inhalation. I have breathed in a lot of fiberglass in my day with no effect, but apparently the carbon is not so benign.

Bruce Patton
Still flying HP-18 69S