Steam cleaner, West Bay Paint crew, upper deck, About the Bridge Series Inquiry The steel sidewalls along the upper deck are steam-cleaned to remove road grime that’s been splashed on them by traffic through the years, before being given a fresh coat of paint. If the old paint itself has been damaged by vehicle contact or the elements, it will be smoothed out or removed entirely by hydroblasting with extremely high-pressure water that will remove paint without damaging the underlying steel.Only in the most extreme circumstances, where there has possibly already
been corrosion damage to the steel itself, will the decision be made
to use sandblasting, which will almost certainly remove small amounts
of good metal along with any rust, incrementally changing the thickness
and ultimate strength of the affected steel. |