Spray adhesive is the best way to attach two large surface areas together.  I use it most when mounting paper and fabric to surfaces like cardboard, matte board and foam core.

Spray adhesive comes in many brands and varieties.  The one I hear of most frequently is Super 77.  When buying it, think about what materials you will use it on, and read the back of the can.  Some varieties are good on paper, but will melt foam and plastics.  Others are good on plastic, or other surfaces.  

Sometimes I will draft a model piece on thin paper, and then want to build it.  When I do that, I will often print the drafting onto watercolor paper or bristol board with a laser printer (so the ink won't run later) and then mount that paper onto the thicker material I intend to build the model piece out of.  Then I will cut it out and build the piece.  I use spray adhesive quite often in this case.  The surface is then paintable and the details are already drafted on.  This is a great technique for roughing in a white model that you intend to finalize in color later.  It gives the director an idea of what everything will look like without you have to build every detail first.  Then, as you get the director's approval on basic layouts, you can work on detailing and finalizing without wasting a lot of time and effort.

Remember to always spray upside down at the end of using until the nozzle is cleared.  This stuff is gummy and sticky and will clog your nozzle very quickly if you are careless. 

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