With some employees returning to Blizzard Entertainment's Irvine campus after the holidays, we're treated to a view of the famous Orc statue being cleaned… with fire! Sadly you won't see the Orc bathing in an epic jet of flame, but it's actually a fairly common practice. Outdoor bronze and several types of stone sculptures are often waxed to protect them from the elements and prevent the deterioration of the material, and like anything, it needs to be cleaned periodically.
Read more on wowhead.com