Thanks for the help guys. I have other pictures I didn't supply, but the Trek head badge is there as well as the Trek caps and fork 531 stickers. You can see it in the first image if you're on a mobile device and can zoom in.
I will be getting more images to get a better feel for the areas I had questions about. I do think the paint is original now, though, after looking for info regarding the 710. The BB shell paint is a concern, though. Whether it's as simple as touch up or something covering a more serious fix.