Decaling:
UP big boy by Key.
Again, another model that specifically has the 4020 on the box label so the engine was decaled as such.
I found this web site that says the lettering was never white or silver but aluminum and they never used white for the main lettering. They said it only looks white due to black and white pictures plus aluminum oxidizes to white.
http://utahrails.net/up/up-steam-paint-index.php
This took awhile to research as my Tenshodo big boy and all the factory painted engines that I was finding looked white. I see the web sites point in that even the colored pictures of the tender look white as the 'union pacific' lettering is aluminum and the 'fire hose only' is white yet they look the same in the picture.
My references showed '25,000 gal' at the bottom of the tender with some nomenclature under it which I was not able to read. Fortunately, the decal set had some nomenclature under the '25,000 gal' , which I also was unable to read, but I added it anyway!
It took some research to find what that writing on the air tanks was but I found a picture of it and the decal sheet had copies. (pressure tested and the date).
The front UP emblem was a brass, raised lettering so I used a 'dry brush' approach to getting paint on the very shallow raised lettering by dipping a piece of paper in the cap of some aluminum paint, wiping the excess tip off and gently touching the paper to the raised lettering.
Some brass owners plates were on the tender, again with raised lettering but suppose to be in brass, so I used a woman fine nail sander and gently rubbed off the top layer of black paint.
