IBuild - Loving the Razorback! A few comments and suggestions, if I might...
First, with the Alclad, you may want to check out this article: http://www.clubhyper.com/reference/nmfcb_2.htm. The guy uses Gregg Cooper's base coat/lightened coat/blending coat process and applies it to Alclad. Might be worth trying. I've also read (I think on Swanny's site) that sanding different panels with different grits or in different directions, etc, can change the way the Alclad looks when it goes down, for more variability.
Second, they're actually blast tubes on the P-47, so not necessarily finished in gunmetal. I've seen pics of some that were painted in whatever the plane was, others left bare aluminum, etc. Because the muzzles were so far back, there was actually very little in the way of gun staining on the leading edges of the wings, so FYI for weathering. Master makes some droolworthy turned brass barrels if you're interested. Direct replacements on the Tamiya kit.
http://ultracast.ca/products/Master/48%20Scale/MAM-48-002/default.htm
Third, the prop. First, THIS POST has some great background on the four prop types the P-47 used (and a good look at the blast tubes in wartime, as well). Now, judging by the way the props look in the manual, I'd venture that's a 13' Curtiss-Electric cuffed paddle prop on the left, and a 12' Curtiss-Electric "toothpick" prop on the right. Judging by the photo of KT:
...I don't think either is correct. Sadly we can't see the propeller boss in this image, but going off of the blade shape, lack of cuffs, and the general look where the blades mount to the hub, I'm 99% sure this is a Hamilton-Standard paddle prop. But...there's a good chance that KT arrived from the factory with one of the Curtiss props and scavenged this one in the field. If you want to be a stickler for accuracy, Ultracast makes this prop for the Tamiya kit.
Can you tell I've been reading up on P-47s?
On the Bench: 1/32 Trumpeter P-47 | 1/32 Hasegawa Bf 109G | 1/144 Eduard MiG-21MF x2
On Deck: 1/350 HMS Dreadnought
Blog/Completed Builds: doogsmodels.com