Spray Lacquer? For general use, not meant to be "Archival" I just use Ace Hardware glossy. 1/3 the price of others, and just as good. For archival customer use I go with Premier, or Lacquer-Mat, Lyson, or Bulldog, depending on what surface. Check out
http://www.inkjetart.com/ for its reccommendations, listed as to what medium.
I also NEVER put glass over my artwork, since the glass causes reflections, lost contrast and color, and also traps whatever contaminents behind the glass e.i. formaldehyde from the wood, solvents from paints, etc. All these chemicals can have a deteriorating effect on the ink or paper surface, in my opinion.
Bill/SOB