Jaguar Repair Questions? Ask a Mechanic for Answers ASAP
I'd say its most likely to be heat damage from the engine, the underside of the bonnet should have a heatshield but over time this can degrade and transfer to the bonnet metal
as its under the paint I'm sorry to say that only fix is to have the panel re-sprayed
I'd also check that you don't have an exhaust leak thats creating more heat than usual
do you still need help?
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