DON'T do the chemical dip. The problem dipping things like hoods, doors and trunklids is that regardless of how well it is done, some amount of the chemical will remain trapped in the areas where the sheetmetal is folded over on itself. Eventually this stuff will seep out and damage the newly applied finish from the inside out, especially if you live in a humid area. Bead blasting would be better for such a piece and you need to pick someone who knows what they are doing so they don't warp the metal by going too fast or too aggressively.
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