Nice restoration! However, I would've recommended using a ruler to get straight lining on the tender. What I would've done for the number would be to dip a tiny 5 in yellow paint on its correct side and "stamp" it on the sides.
Here's what I mean:
You could add the black border yourself after the application. BTW, the "3 things on the front of the footplate" are lamp irons.
Here's what I mean:
You could add the black border yourself after the application. BTW, the "3 things on the front of the footplate" are lamp irons.