Well, I’m certainly interested, though without any specific suggestions to make. Please post photos if you do something.
I never actually showed what I did so here's a few pics in case anyone was interested. In the end I just went with a few stickers as I wanted to add a little bit of theme and not let them dominate the board.
A few addboards and tried to brand the buildings near the start line to be like team garrages:
It's a monaco track so you need to have Martini in there!
I still need to add a sticker here. I like the tyre garage on this part of the track!