Dale, the instrument panel was painted using "wrinkle paint"- a product which wrinkles up as it dries. The color was a sort of silverfish gray and all '29 cars had the same color. I have been unable to find wrinkle paint in the gray color, so I've painted the panel using black wrinkle paint (available in car parts stores -- used on some modern valve covers, etc) and then overlaying it with the correct gray. Worked out fine.
There is only one light bulb for all the instruments and as I remember it, they all have a slit in the side to admit light, covered with a strip of green celluloid. Not very even distribution of the light, but "good enough", I guess.
Hope that helps.
All the Best,
Chip