Removing hardened tree sap?

[BlackenedRR]

Ok, so the guy I bought my truck from let tree sap just sit forever on the paint. I got it all off the aluminum fuel cell in the bed, using a drywall sanding sponge. I'd REALLY like to not use it on the paint though... LOL!!! Any tried and true techniques for doing it at home? If worst comes to worst, I will sand it down and just have the whole truck cleared again I guess.