Great stuff.
A while ago a friend couldn’t understand my fascination with the 47 he said they are all the same !!! Once I had pointed out and shown him some of the differences he saw them in a very different light . It’s easy to look at a 45 and say ah yes they are/were all the same . But start looking on the web and in books and it soon becomes evedent that , that’s simply not the case . Yep they were rail blue after being green but there’s a lot more to it than that and as we say the devil is in the detail & it’s the detail that counts . Without looking at weathering options .
Have a google and I think many will be surprised with what differences are found if you look for them , any generalisation of a 45 being rail blue end off , is to me pretty unjustified.
Andy H