I've just been through this on an old car we got for the kids. It had
lived under pine trees for most of a year before we got it. Much of the
pine sap had hardened, and wasn't the least bit gooey. A couple sites
say this is frequently not actually pine tar, but poops from bugs that
live in the trees. Whatever. Here's a list of things that DIDN'T work:
WD40 (spray and gallon can), gasoline, rubbing alcohol, Coleman fuel,
Dupont Prep Sol, a couple spray wheel cleaners, GoJo orange hand
cleaner, a couple different spray engine cleaners, two other orange
based cleaners.
What made some headway was Stoner Tarminator, a spray on cleaner. Soak
each spot for a while, and it would eventually soften a bit and come
off. A lot of work on each spot, though.
Stu
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