Nothing worse in my view, after spending a couple of hours cleaning and polishing your car to see it let down by unsightly tar on the bodywork, which ordinary polishes and cleansers won’t shift.
A product that I like to use for this comes from Autobrite called Just The Tonic Tar and Glue Remover, which is a hydrocarbon-based formula containing no chlorinated solvents or methanol.
I’ve always found it to be very effective at removing tar, glue, and asphalt from most hard surfaces including painted surfaces. It has a decent level of cleaning action, doesn’t smell like a petro-chemical plant and does what it says on the label. It’s a great product to have to hand on your shelf.