Have you tried taking it to a body shop and letting them try to polish it out? They have a wide variety of products to pick from and the experience to know what might and what won't work. Probably a better idea than risking your paint to chemicals.
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ASE Certified Master Automotive Technician w/L1.
ASE Certified Master Medium/Heavy Truck Technician.
Certified EVT (Emergency Vehicle Technician)
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