We use to wash Hawaii Raceway Park, not the whole track just the oil spills from the Drag Racers. These are before and after photo’s of the curbs at the exit of T-6 and T-9 at Auto Club Speedway where I ride with Fastrack Riders and race with WERA. I did not want the dirt to be kicked onto the track so I cleaned the curbs. 
 
I’m looking forward to three days of riding the Iceman Ninja starting tomorrow. Â I’m going to use the curbs!