Used this mask for the first time spray painting my 1976 Yamaha motorcycle tank, with 1K base and clear coat spray paint. I could not believe the chemical smell when I took off the mask in my garage after I was done painting. I quickly put it back on and, 0 smells. Obviously effective to an amateur! Also this mask is easy to use, very comfortable to wear. Just the instructions were almost impossible to navigate, so much unnecessary detail and such little actual information. Luckily it's mostly self-explanatory.