Rookie's answer is great for tree sap. I'm from Doug Fir country, the Pacific Northwest. I use Best Foods and or, simple butter, the dairy product or a butter replacement. They do zero detectable damage to the paint. Do not use any paint thinner. Thet damage the clearcoat. Mayo or butter will also take pitch/sap off your hands. If left on your paint, doug fir pitch will eat right through your clearcoat and paint to bare metal. Nice stuff, but not on your auto.