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Ok - Am I missing something here? Is the primer you mentioned a self-etching primer? It was my understanding that the bare aluminum needed to be etched then primed. I guess I am a bit confused as to the function of the sandblasting and the etching - do they accomplish the same thing as long as the primer is applied in a timely manner? Or does the blasted aluminum need to be etched then primed (or both steps handled in one coat with a self etching primer)?
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