I've been using carnauba on clear bra for 5 years with no issues... When talking to a clear bra dealer at BJ auction he recomended no petroleum based wax be used.My just arrived 718 is being done complete front end to the door hinge lines, including mirrors and headlights. I had my 2016 and 2014 done half hood and rest the same but over time no matter how careful you could see the line just a bit...…..All these and the new one are very cark colors, Black, Mahogany, Night Blue...….and except for the slight line I mentioned, you could not distinguish covered from uncovered in finish and shine (I always coated the clear with non carnauba treatment.....).