I like how Napa is proud to put city of manufacture on their filters; assume that's where Wix plant is. North Carolina made, all good....
Same issue with whether to paint or not with my new to me 1955 Super A, just as peely and nasty looking as this tractor, but so far I'm doing just what Mopardude is doing.
Though I can't wait to degrease and gently wash off. My 4000 psi powerwasher would take every bit of remaining paint off, but
when something that looks
old runs young, well that at least to me can be more interesting. Unlike Mopardude I'm no mechanic so my tractor still isn't back from the shop. In fact, it hasn't set foot on my property yet, went straight to dealer to do much of what OP is doing here.
As far as painting engines and anything really old, I spent three years as a yachtbroker in Fort Lauderdale and went out on about sixty marine/engine surveys. One of the worst things anyone could do to the market value of the yacht was take a can of white spray paint and paint an entire Cat 3208 or even the B and C Cummins all white, electrical wires, you name it, everything got painted. I happen to think painting electrical wires is bush league but no offense to anyone else meant, I go through a lot of blue tape when painting. Painting the whole engine usually meant something was being hidden. Fresh paint shows leaks better though...and most of these old unrestored tractors are drippers. Like the 8V71TI Driptroits I used to own.
At some point if you fix/replace enough parts with new it does look a bit odd, shiny bright parts against the speckled background.
But that's what a real farmer would do, back in the 50's...
Today I think we wax tractors more than most folks used to wax their cars. I do....

But that's on a new/newer nicely painted tractor.
I look at the old scratches and wonder
how did they do that? Probably would have made a good paleontologist...
Nice high resolution photos