It can be sprayed, but the spray cans are expensive. They have a top nozzle can for ceilings, and a regular nozzle can for general duty. I don't know if the material that comes by the can can be sprayed, but I imagine it can.
It should stick to virtually everything. I went over everything on the walls from unpainted plaster, plaster covered with sanded panel adhesive, mold, regular latex, and- you get the picture. It's expensive though, and most (not all) sprayers aren't very efficient, so I rolled or brushed on what I didn't buy in the spray cans.
I know you're talking about actual sprayers here, but I've always thought the Wagners did a lousy, gloppy job- and the other ones out there are awfully expensive. Cleanup is a hassle, and you may spend as much or more time doing that and trying to get good results as you would with a roller.
[This message has been edited by JayF (edited December 09, 2002).]