A few things to consider.
As you say TB, that all or almost all the metal used would be coated in zinc yellow or green chromate, and then a standard paint job before leaving the factory (the dove/light grey?). And then re-sprayed when moved, a change in camo policy or 'ownership'.
Without modern H & S standards, the quality of the paint from the factory was probably very good, but in the field, not so. The chromate was electrolytically applied so lasted a long time, only after hundreds of boots clambering over the leading edge has it taken it back to bare metal.
And now the biggie...the simmers perception of what it all looks like in the sim. You cannot hypothesise what happens or what it looks like in the real world, and directly transpose that to the sim world, it just does not work like that.
How Fs9 and others sims handle light, and therefore reflection, shine, sheen etc is nothing like the real world (in fact Fs9 is pretty poor at it), so you have to interpolate ie make it work by basically 'fudging' it, or trial and error.
The other problem is that using poor quality colour or B&W photos as accurate datum points is a dangerous game. The biggest problem is that it is nearly impossible to accurately work out what the light conditions were or where the sun was, and therefore what colour, how flat, shiney or reflective a paint scheme was when the pic was taken. You can second-guess, based on data, and that's logical and reasonable, but would it look right in the sim? It also doesn't take into consideration the wear and tear of war life, wind and airbourne particles buffing surfaces, the stains; oily rag wipes, the washing down with a degreasing engine clean, salt water spray, poor carburetion or burning cordite staining.
And a huge pet hate of mine, people believing a matt paint finish is truely matt, it is not, there is
always a level of sheen or shine in certain light conditions. Look at any sim ac that is 'flat' and then shined (even subtly), the difference is huge, one looking lifeless and unrealistic, the other more like the real thing, your eyes do not deceive you and you sense what looks more realistic and appealing. Try it out with a sim ac or even go and look at your car outside, in different light conditions and if it is an older car how a matt-er paint finish affects all this.
What's your view on the F117 Nighthawk...a very matt black ac?
From pic 1 to pic 6, same ac, same paint scheme/finish, but is it still a very matt black ac?
Back on subject...nearly done.....
Cheers
Shessi