I have tree sap all over my car. I have tried washing it and scrubing and it wont come off. But i used it on the sap on my windsheild and it came right off in one swipe. Can I use goo gone on the body of my car or will it damage the paint? Or what if i used it then washed it right away. Please do not guess whether it will work or not i need someone who is 100% sure.