this is the stuff i use....
its a really nice stuff. and if your dry your car down anyway, why not give your car a little extra protection. just keep it off the windows.
as for pine sap... dont let it dry hard! get it while its soft. i have a huge maple tree that good for some big globs of sap in the spring time. pick off what you can while its soft with a napkin/paper towel. then i use "incredible pink". its a heavy duty degreaser cleaner. i buy it at napa. do yourself a favor and dilute it by half. its fairly strong stuff, and for car cleaning 50/50 with water is more then strong enough to do those kinda jobs. spray on (just the sap) while the car is wet, and you shouldnt need to do much more then wipe it around with your index finger. it should loosen that stuff right off. might take a couple of applications, and a little elbow grease. just be careful to not scrape too much with your fingernails. just use your finger. then rinse it down good/wash the rest of the car.
just make sure you wax those areas afterwards. the incredible pink is good for stripping off the wax also. use the eagle one^^^^^^^^
side note: while your at it. i start my car wash by taking my soapy brush and spraying it down with a good amount of incredible pink, then i wipe it on the nose of the car, and mirrors. then i go about washing a different area of the car. by the time i get back to do the front, the bugs wipe right off. nothing else softens the bug guts like that. just be carefull about spraying it on straight. it has a way of attacking (streaking) raw plastics like headlight, and black plastics. so only spray it on an already soapy brush. if it does, some good wax (i love turtle wax ice, its amazing on plastics) on the headlights will take the streaks out.