Tacking without a hood is shown on these rod shows all the time. I think it's one of the dumbest shortcuts you can take, no disrespect or flame intended. It only takes once for a spatter to get under your eyelid. Then since it's steel, it'll start rusting in your eyes. If you don't lose vision in that eye, the pain and the medical bill will be awesome.
Spend a little money and get an autodark helmet. Buy the autogrind version that lets you go from welding to grinding mode if your work has you tacking and grinding to fit.