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Cover either single side of a household style freestanding box fan, and no air will flow through.
Likewise brakes, whether drum or disc, have splash shields blocking the inner side. So if the wheel isn't open, there's no cooling airflow.
Debate the idea all you like, but notice that even in Nascar, where there's virtually no braking, they still don't use discs over the wheel faces. It's been tried, the results looked good in the wind tunnel, but on track testing was what killed the idea. By the way, your aero efforts miss even the brake cooling ducts that Nascar still uses in some races. Those would add drag, and most people do them wrong at either end, or both ends.
Choose a flat face wheel like my S-10 in my Newb Intro thread titled Sad about good MPG. Those help MPG compared to dished wheels, but still help brake cooling.
All y'all's reasoning and book learning means nothing in reality, until you've tried it. Or someone else has. Part of what makes humans human is the ability to learn from the mistakes of others.
I understand liking trying things for yourself, but when other lives are at stake, do you really have any right?
My brake fade happened as safely as possible short of renting a closed venue.
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