For lack of a better place to post this I thought I'd go to the "experts". I recently bought an '81 240D stick - not pristine, mind you - just a backup "daily driver". But part of the deal was a generous peppering of pine sap from sitting under a pine tree (that feature came "at no extra charge" per the seller)...
Needless to say, appearance is secondary on a vehicle like this. Still, I'd like to get the pine sap off. I took it to the local car wash today and tried blasting the stuff off with the spray wand. (Result? Might as well have been pouring water on a duck's back - if you know what I mean....)