I think the brush that you used for the white ridges was too big?
Also, you'll need to blur the text a bit, won't you. Its edges are too sharp to be plausible.
Without comparison?? Memory??? What are you talking about? Aren't you comparing the prints???????
No.
I'm worried about that. It really shouldn't have been necessary.
For the 7, I think fairly close to the real colour, on Multiply mode. BUT - you'll need to lightly mask down the ridges of the roof iron, to keep the correct white look.