Hippo
Lord Hippo
The tar stuff is just an example of some of the soak in stronger cleaning chemicals available that wont strip the paint/lacquer if used correctly. Tree sap is simular in nature. Other stuff available in the range.I'm not sure if its tar based - its rock hard little dots.
Been to busy cutting trees today to get the lawn mower out, so haven't tried petrol.
Will get to it in the week.