Pete,
The Arizona sun will kill your paint and the only things that you can do it to protect the paint by applying good products like NuFinish or anything else for that matter and, keep the vehicle out of the sun as much as possible. Road salt that is used here in the northern states(not all states) doesn't seem to damage the paint as it kills the steel body. We have alot of rust surrounded by shiny paint.
The Arizona sun will kill your paint and the only things that you can do it to protect the paint by applying good products like NuFinish or anything else for that matter and, keep the vehicle out of the sun as much as possible. Road salt that is used here in the northern states(not all states) doesn't seem to damage the paint as it kills the steel body. We have alot of rust surrounded by shiny paint.