I want to set the background color for a specific buffer, but I can't get it
to work quite right.  I am able to alter the color of the background for the
face default using (face-remap-add-relative 'default :background "#F9F9F9"),
but if the text ends before the end of the buffer, so does the differing
color.  By contrast, (set-face-attribute 'default (selected-frame)
:background "#F9F9F9") will set the color for the whole buffer, but every
other buffer in the frame as well.  Is there a way to set the entire
background of just the current buffer?

Colin