I am on my 3rd Rocket, 08 plate had the wheels replaced under warranty and the last, an 11, the wheels started oxidizing while still under warranty. Triumph didn't want to know. Took them to be polished and sold 6 months later for a 13 Roadster. They started to go after a year. Both of them never go out in winter (I've retired) and are always wiped with ACF50 before putting away. Again, wrote to John Bloor. Again, not interested. Said they made a board decision not to treat the wheels after all the problems they had with the earlier models that were lacquered. I own a 2012 Cooper S and the wheels are also alloy and are never more than washed. Still perfect. Was going to buy a XCX but, instead, selling the Roadster and buying a Kawasaki Z1000SX. Have been riding Triumphs since passing my test in 63 and will never purchase another one. To say the bikes can only be used in dry weather is absolutely disgusting and Mr. Bloor should hang his head in shame. Had to get mine powder coated before I could sell it.
Hope yours will be as good as mine are after the powder coating but we should not need to do it.
Regards, Martin