On the switchboard front, the vinyl letters are the best way to go, rewired, new oil and main lenses, placed next to an NOS unit, looks just as good, well chuffed with it.
Also messing around with an instrument panel too, a good clean up, repaint the bezel, new RPM and speedo dials. I have found a spray over of vinyl and plastic cleaner on the dial faces brings the dirt off, and gives them a almost new look again.
Stainless 2BA setscrews finish the front off nicely.