Re: Primer for aluminum frame?
It isn't so much what you plan to primer but what you will spray on top of it. The primer and the base/color coat must be compatible. Mixing brands or types of primer/paint isn't a good idea. Aluminum doesn't require anything special unless you're into aviation fabrication where corrosion would be a concern. For a bicycle, just match the products and you'll be good to go. Read the labels of the product you select and follow their recommendations.
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