Get this,totally enclosed porch (6mm plastic), fan blowing out from porch to outside (the vapors, the vapors), slightly open sliding glass door allowing flow of air from house through porch to outside. I varnish at 11am with this z-spar polyurethane "varnish", go paddling, back by 6:00, varnish is dry (I think I like this stuff), run hand six feet along boat with small tuffs of yellow pollen piling up. Wow no wonder I feel like I've got pink eye.