Labeling CNC Control Panel

I am revising the back panel of a box of servo drive logic.
My question is does anyone know of a way to make a workman like
overlay for the panel using a HP Deskjet 1220C printer? The printing
area is big enough to allow printing an overlay that covers the whole
panel in one piece of something. I want to put labels near each
connector to indicate the connectors purpose. I have a CAD program that
can be used to drive the printer. I would like the overlay to be
resistant to the stuff that gets sprayed about near the machine, if
possible.