GtoRA2 me and my dad restore old cars,,,and we have ran into tree sap many times,,,bug and tar will not help too much<~~been there done that,,lol,,it doesnt even soften it up much if there is alot of sap on your rig,,lol,,but you can try a few coats of it,,incass the tar isnt that bad,,but if its hard as a rock and big spots,,you in trouble,,lol<~~only thing we figured out that works so far on that,,is about 5 freinds to pick each peice of tar off with there fingernails or somthing like a guitar pick,,,you will scratch your finish if your carefull,,,then buff it out with a wax buffer after you think you got it cleared
try alcohall,,,water wont help too much but best to let the sap soak in soap or bug and tar<~~sap is a cars worst nightmare,,i never seen one thing that would work besides the old fingernail soap and a lot of freinds,,lol