Koch Chemie Eulex Tar and Adhesive Remover is the solution for the removal of tar, sap, rubber, oil and grease from any surface that is capable of resisting a solvent based cleaner.
The application process is easy, and you really only need to apply to a clean towel and leave on the surface that's effected for a moment before rubbing off. More difficult areas can utilize a swatch soaked in Eulex to dwell for a bit longer on the effected area before being removed.
Eulex is not compatible with powder coated surfaces. Always read labels and check for surface comparability and possible interactions before application. Shake before use.