Baking Enamel:
One of the big differences between vintage factory finishes and spray can paint jobs is that factory paint is usually baked on to the item. Spray paint is softer and more prone to scratching and chipping, plus the gloss can be different if you're not skilled at spraying.
Fortunately, it is possible to bake enamel at home. You will need an oven large enough to accommodate the item, and you'll need to remove EVERY plastic and rubber part from it. You also should practice on some "junk" items before tackling a HTF vacuum. Here's a link to some instructions:
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