Great job man, I love the everything you've done so far. Normally I will disagree with at least one thing on a build (like most others) But this is just looking fantastic, well done, and definitely not tack/gaudy w/e you want to call it.
Also I understand the aluminum polish sadly, it's not much fun I'll say. But the method you used it about the same exact I use. I would recommend not starting with a coarse wire brush (also noted by you, just wanted to say it again) for any reason, it will just dig into that aluminum like no other. For really bad stuff thats not pitted I would say just use sandpaper and go in this order 150-220-400-600-1000-1500 (if you can). If you have pitting the fine wire brush will give it a semi uniform pitting to work with when you sand.
Anyways, thanks for sharing please keep posting and have a good weekend 8)
-SD