NO NEED TO REPAINT!
NSA has also seen safety benefits in coating their viewing bunkers to protect spectators. The coating reduces the explosive impact of flying fragments caused by the blasts. These fragments can be the size of a baseball.
ArmorThane develops and tests new polyurethane and polyurea coating products such as ArmorBlast for ballistic and blast mitigation. Products designed for blast mitigation require maximize elasticity and strength to expand and retract without ripping apart. NSA bunkers are built then sprayed at the training grounds using Mobile Coatings Units.