She was pulling your leg to see how far you would stretch!
It would take an incredible amount of time to dissolve a car into a liquid state. It would take acids that do not exist, then you have to separate the metals because you can't have an amalgam of organics (plastics) and other metals, and make anything out of it worth anything substantial. Then you would have to add that to a paint base, in a form that would allow it to be metallic paint. Literally it's not possible. But I bet she got a big kick out of dragging you down that imaginary path.
She's a tall teller, I forget what those people are called but they are the most colorful story tellers. It's a bit of American history, an art form that is fast disappearing, it's a type of folk art. Be glad you experienced someone who still practices it.
Scott
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