First I was disappointed as I was not able to find the build sheet on the fuel tank.
But as I was looking deeper, there was something on the tank cover. I got a very big smile on my face.



However. As I came closer to it......





Does someone have succesfully got this paper restored by a professional, so that the letters get somehow visible?

Regards
Peter

I'm not aware of anyone in general that could, but you MIGHT try a museum in your area. They may have a paper conservator, or know of one that might be able to help.
One thing you definitely need to do is keep that sheet OUT of any direct light....folks have removed near perfect build sheets before, and the sheet turned brown within days, if not less. The more you protect it from light, the better your chances of having it "restore" to a point of being able to read it.
Good Luck!!  

The Las Vegas CSI can reproduce a pristine copy for you. 

If someone can help here, then I think it is Abby Sciuto (NCIS) .

I have searched and contacted some paper / document restorers.
So far only one is willing to have a closer look at it. Maybe next week I can visit him and who knows, maybe he is as good as Abby.

Not to get too far off-topic but I came across some pictures of the St. Louis Corvette assembly line that shows 1981 Vettes that have what appears to be Build Sheets (Tank Stickers) fixed to their gas tanks.  I always thought that by the late '70's that all Build Sheets were placed inside the vehicle somewhere.  (I found a Build Sheet in my Vette under the driver's seat carpeting.  It was not the correct Build Sheet for my car but it was a Build Sheet.)

Can anyone shed some light on this?  Thanks.

There were multiple copies of the build sheets, for each line. The body line had copies,as would the frame line. The sheets glued to the fuel tank are the most common, but they have been found in various locations on the car. The one on the fuel tank was because it was the most visible while the car was going down the line.
Some have found neatly folded build sheets placed between the strut rod bracket and diff, as well as under carpeting, stuffed in the back of the seatbacks, behind the dash...you name it. The tank sticker was placed there all the way to the end of the Shark era cars. With the C4 era cars, they also placed one inside the front suspension cradle before it was mounted to the chassis. C5 cars have them stuffed inside the front frame crossmember....