Painting in Progress: Believe in an endless world

This painting has been slow in the making (haven't they all?). I think it's almost done. I was either going to just add a drop shadow below the white border, or possibly use a border similar to this one:


However, I just realized I am low on vintage train ledger paper, so I don't have enough to do this border. Thoughts? Suggestions? Here it is so far:

Original image: