Could try a bit of Fairy liquid, it gets rid of grease pretty well. Not sure how well it'd work on tar but it's worth a try since you'll probably already have some in the kitchen. Doubt it'd do any damage to the paintwork too.
@Magic started
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Could try a bit of Fairy liquid, it gets rid of grease pretty well. Not sure how well it'd work on tar but it's worth a try since you'll probably already have some in the kitchen. Doubt it'd do any damage to the paintwork too.