Sad to say, I have been lax and not really applied anything in some time. Last time, it went through an auto car wash with a final coat of Simoniz wax. Regularly maintained with natural rainwater since then, LOL. I have some Collinite 845 that I think is about time I used on the Edge though, with winter coming! Will try to coat the wheels, but getting them cleaned up without taking them offcar will take time.