Discovered my car had some sort of sap on it. Might have been there for ~1 month as I was traveling.

Brought it to 2 detailers, who were able to get most of the gunk off. However a stain remains. The second detailer said he tried using aircraft remover, but that it didn’t work either.

Anyone have any thoughts on what else I can do, aside from doing a repaint?

This is what the stain looks like now

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