Black Wattle Sap

I was almost going to put this in the OOOps Forum......but I actually would prefer an answer rather than the Point & Giggle.

Someone at our place.....whose name in not Noel...parked our car under a Black Wattle tree on a hot day.
The front & rear glass and the Boot & Bonnet have these clear drops of sap on them ....now set quite hard.
The removal from the glass was easy....one of those razor blade scrapers, but I'm a bit hesitant to use this method on the Duco.

Any thoughts or remedies???


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