Unusual Engine Colors

John Trickler said

How well does the paint hold up on the aluminum heads? Did you use self-etching primer? Going to paint my aluminum heads and manifold too.

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I have aluminum heads. They were new Edelbrocks. Cleaned two or three times with a Scotchbrite pad and lacquer thinner, then used only P4349217AB "Mopar" blue engine paint on them. They have held up fine for over 10 years.