Biggyniner,
Well Sir, I'm not familiar with your particular coach but, if you're referring to nicely painted aluminum siding, and, it's in good shape already, all that needs to be done is a good wash and then, using a good auto wax, which there's only a zillion out there that will work just fine. I've used "Kit" for quite a while, Nu-finish is good too. Recently I've been using the Mcguires cleaner/wax and it's working just great. It's real easy on and easy off and, as far as lasting, well, none of them last for very long anyway.
So, pick one that leaves a good feeling of a nice wax job and then walk away. Depending on weather, operating conditions, environment (beach/salt air etc.) the frequency of re-application will vary a bit. Good luck.
Scott
