Eric: you could also consider Floquil model RR paints. I haven't used Alclad and once I tried Testors MM Aluminum, but didn't care for the results.
Anyway, for an example, here is Academy's original B-17C, done up with Floquil some years ago.
The problem on the horizon is that Testors acquired Floquil a while back, and recently announced discontinuing that label along with the Polly S brand, so I don't know if the same paint will be available under the Testors brand. Currently it's still available, and Floquil's silvers come in three varieties: Platinum Mist, Bright Silver and Old Silver. I can't tell them apart, though, once they are on the model.
As with any metallic finish, you still have to be sure to remove all scratch marks, sanding marks, blemishes, etc., since they show up really well. Usually it means polishing the plastic. For that, I just use toothpaste.
The Douglas Devastator I'm working on for this GB had a NMF interior, and I used Floquil there. I just haven't gotten around to posting any photos.
Whatever you end up doing, practicing first with a new technique on something that doesn't matter is a good thing to do, rather than risk ruining the major project.
And good luck to you!