Been using FWI Cleaning Wax with Carnauba spray for a few years now. Lifts built-up dirt and grime .. good for paint , chrome , glass and plastic. Problem is they only sell it through pop-up shops in servos and shopping centres (stall usually manned by really tall skinny Ethiopian types that probably never driven anything other than an ox and cart
).. US made product .. website
www.fw1.com.au lists where stalls are going to be. Great product but a little expensive. $45 for two 500 gram cans best I've weaselled them down to.