We don't have a problem with salt in the UK, all our records are set and broken on airfields.
The bigest problem we have is not the length of the airfields but the rules for the classes.
We only have one rule and that is capacity. No class M, A, N, PS, S, A, B, G, F, V, P, 2, 4, Your list of classes is endless.
Sam.
PS, we do have 2 rules other than capacity, Street or race bike.