I've never used it on the Z3....it's ok on a Jeep finish against gum tree sap, pine tree sap,etc. But I would get ahold of carcareonline.com and consult with a few others here that have owned z3's for a long time. I've used 'safe' spot remover to dissolve and wipe away pine sap from my car...but without much success. Anyone have any suggestions for removing sap?!