There are "bug and tar" removers in the car cleaning isle of the department stores. This will work to remove sap also. These will strip the wax off your car also, so it is a good idea to wax afterwards.
To remove tree sap from your car, you can try using rubbing alcohol or WD-40. Apply a small amount to a soft cloth and gently rub the sap spots in a circular motion until it dissolves. Be sure to wash and wax the area afterward to protect your car's paint.
Cars do not have siding's.
Wet a rag or small towel with warm soapy water and put it on the sap and let it soak. Once the sap softens, just wipe it off.
Sap should come off easily be cleaned off with mineral turpentine, engine degreaser and sometimes methylated spirits. If the sap is hard try scraping it with your nail. If you do use one of these, wash the area off afterwards as there are some products that, if left on for long, may damage the paintwork. If you've mistaken tar with sap the tar should come off with eucalyptus oil or one of the above. There are car parts sellers that you could ask and they will probably have a product that leans off sap and tar.
No. Tear the old siding off.
You'll need a petroleum based product like WD40 or Goo Gone plus elbow grease to remove the sap. Avoid using WD40 on car paint, though.
Goo-B-Gone is a good option. If you go to an auto parts store and look in their car care/cleaner section, you will find many different products to remove tree sap from your vehicle.
WD-40 will remove pine sap from a car's finish without causing damage to the car.
Its tree sap from a tree if your car is under a pine tree then that's your answer
Lick the sap off of the tree.
Sap should come off if you just scrub it really really hard. Try using a razor blade and some don's or goo-gone if needed. The razor blade won't scratch the windshield.
do you mean tree sap ? if so use a little paint thinner in a rag and wipe it off