I have to do it outside, I dont own a respirator actually, so I have to resin on a day with some light wind, and multiple shirts over my nose, still not safe, but I'm alive.
I constantly move and look at the direction the wind blows so I dont inhale the resin fumes, usually I dont smell it, it's when I leave my pieces in the garage for the week to lose the smell, the garage smells like pure resin all week.