I think it's supposed to look like that, mine does. Maybe adhesion promoter then a clear coat. DupliColor adhesion promoter is clear, maybe they all are, I don't know. Being where it is, no real moisture or heat, it should hold up pretty good. Some clears will yellow if used in the engine compartment because of the heat. There are high-heat clear coats but I wouldn't think you would need that. Krylon makes an interior.exterior clear. Maybe a satin finish?
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Hank
70 Chevelle SS396(454), M20, 3.73
My Chevelle
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