I use Testors Aluminum paint. They offer two varieties, a flat aluminum, and a just plain aluminum, which is a gloss. You want the gloss version, not the flat. Generally, military aircraft did not have many coats, so it is really almost an eggshell or semi-gloss, but gloss works okay- just try not to gloss clearcoat those areas.
Some private aircraft owners really pour on the coats, and the results can be pretty glossy, but that was not common on military birds.