Nigel As far as I'm aware it is a paint code known only to Caterham or TSK who spray their cars. Not something you will pick up at Hafrords or any where else. I have a touch up pot Tony from TSK gave me when I had a rear panel sprayed. My car is officially MClaren orange but I believe it's same as Aztec. Just differant name. Your welcome to borrow it if it's for a bit of touching in you want to do. Gary