Denatured alcohol is the solvent in your bug and sap removing products.
If you have a can of lacquer thinner around DO NOT USE IT except to Q-tip it directly on the sap itself.
Lacquer thinner will eat paint. Kira
Might be over kill but I always use a little paint rubbing compound. I typically wax my cars often which makes it a lot easier to remove tree sap (in my experience).