Pete,
I pulled my driveshaft tonight and found stripes as well as the stenciling. There are 2 light colored stripes and marks where 2 or three more stripes may have been but there doesn't seem to be color left. The first stripe measures 1" wide, is 4-1/2" from the end of the tube at the rear, and seems to be white or possibly a very light blue. The second stripe is 1-1/8" wide, 8-1/2" from the end of the tube at the rear and is clearly white. The other "stripes" are questionable as they don't seem to have color, just a mark. The first is 14-3/4" from the end of the tube at the rear, is 1" wide. The last is either one 1" stripe or two stripes - a 1/2" stripe, a 1/4" space, and a 1/4" stripe. I also found a yellow paint daub at the rear of the tube near the yoke on the opposite side of the stenciling. Below are pictures. My car is a C4 with a 2:83 conventional rear.
BTW I want to take a look at these in the sunlight and see if a can get a better view of traces of color. I let you know if I find anything different.
Tom