It's raining and Lexie, my black lab, is in her dog house 30 yards away, facing the house and looking this way. Her head is in the shadows, but her black nose I can see well from relected light, even though it's cloudy today. With sun, her whole face could be seen. You decide, but I like a face mask with elastic or draw/tight cord pulling my eye-openings back & down slightly. Never had a problem this way with shooting or eyes blocked. I've not used face paints, but the burnt cork sounds intesting - I may try it. I know for sure that doves turn when they see my face and hands that aren't camoed in the corn/bean fiels.