++What compressor do you have? It may work for awhile, but it will burn up if you run it too long. Home use compessors will not handle the constant air reqiure to blast. Even the cheaper commercial ones won't hold up to constant use. A 100 lbs pot blaster from tips is what I have, I started with a siphin one, didn't cut well.
Stencil paper? Do you mean blasting mask? ++anchor. Cuts best on a tang type plotter, drag knife ones like roland don't work as well because of the thick mask.
Do you have an air supply helmet? Proper protective gear? A seperate compressor for those?
An area large enough to do the blasting, or a cabinet?
Not trying to be a buzz-kill, just warning you to what lies ahead...