If the outside wall isnt caked in clay they got the track wrong, don't care where you are.
One of the best ways to bake a track to dust is run high horsepower and wings.
Its funny that a insurer would rather have guys racing on a dusty, vision imparing track. Maybe theres another way to slow down, take off the wings so you have to back it in.
Your looking for dirt in your beer not dust.