Painting fuel tank

[Smokeem]

Just got everything done being mocked up to install my rear under bed fuel tank. Now I just got to paint the tank. I was thinking of either painting it the body color (dark Blue) or just going with gloss black. If I was to go the black what product would be best? I was kind of thinking maybe using POR15 or a type of undercoating/ bed liner? In your guys opinion what do you think the better option would be.

Thanks Rick
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