Certainly don't need a rotary on cossie paint, mine is like butter.

A lot of folk don't want waxes on their cars anymore, it's all about the coatings. Personally, I still like a good wax now and again but I can't ensure anywhere near the same durability and the increased hardness can really help protect the paint. Nanolex is my coating of choice and I've been using their products for years.