Oh my, that's a lot more prep than I thought. I was hoping to go simple and use acetone or brake cleaner for everything (except body filling of course). Acetone removes wax, at least car wax but I don't know if it's the same type on the body panels.
Maybe 70% isopropyl alcohol could remove wax and final dust cleaning before applying. I'll do some search as to what people do for the prep! I'm glad I asked.