that speedball diazo emulsion you can apply pretty thin and still get a good stencil. i use one of those 50 cent plastic putty knives from the hardware store instead of a fancy schmancy scoop coater. just make sure you get a nice consistent coat on the front and back.
also, i dont' really use a photo safe light when applying my emulsion. i just use a normal bulb of low wattage (60 or less), and just do it quickly. then leave the fuckers in the dark to dry.
anyway, yeah i think you should be able to burn tonite. just give it a few hours with a fan. at least give it as long as you can. and definitely test the hell out of the stencil once you wash it out. might get blurry.