Removing Staining from Hand Carved Granite

Watch as 117 years of environmental staining and soot buildup are carefully cleaned from hand-carved granite on the historic Longfellow Bridge in Boston, MA (USA). Masons worked surgically to preserve its intricate details. Using Sponge-Jet's dry, low-dust technology, restoring granite can be a straightforward process. Check out 10 minutes of cleaning condensed into 60 seconds...