@Marco
Chinese archaeologists have been using a spray made by Germans to prevent the loss of color on contact with air for years now.

[Greatest treasures in emperors' mausoleums]   In modern archaeological theory, digging ancient tomb is harm; insufficient preparation to dig is big destroy. They have been balanced with the environment, including land, specific water and various germs. Originally Terracotta Soldiers are colorful, but after digging to contact air, they lose colors in three days. (Preventing way is still not found.)     Pre-modern traditional thinking of China, digging emperor's mausoleum is very unlucky for individuals and country. So these great mausoleums could preserve precious things. (In my research the English translation is not very good. Emperor Qin Shi Huang is not the first emperor of China but the first grand emperor. Yellow Emperor (about BC 2680) is the first emperor of China.)   We could not fully understand human's great achievements in 5000 years history until 2050; because China has about 120 great mausoleums of emperors. Possibly they preserve greatest cultural treasures, even including tributes from the Persian Empire, Indian kingdoms and Korean kingdoms and so on. They are so precious, thus they need to wait sufficient preparation and technology for digging. They will be dug after 2050.

Hmm .. should be interesting to see graphical representation of the palace. it'd be like another trip in time.  I wouldn't be surprised to see that Emperor Shi sitting on his throne instead of lying in a casket.  In all his skeletal glory, of course.