so my car was parked under a pine tree for a while... i didnt think anything of it at the time, i washed it today and its covered in hardened pine resin or sap or whatever

a quick search says bug and tar remover.. i have some but it didnt work very good on bugs and stuff so i doubt itll be effective but ill give it ago..
another suggestion was kerosene.. i dunno, any takers?
i also have a real old school bottle of "Goof-off" its 95% xylene.. the bottle says "may damage some automotive paints and oxidised metal".. but its also suitable for "fully cured varnished and oil-base painted surfaces, glass, all metals, nylon, vinyl etc" at least ill be able to get the shit off my windows with it..
cheers,
rob
p.s. anyone put xylene in their fuel tank?? lol