I have been rolling the edges over and gluing them down. This works great when the line is straight and doesn't cross one of the rows of pile in the carpet. When it crosses rows, it looks like crap.
So, I bound that edge. I didn't want binding on all edges. Not the look I was going for. I think the one strip of binding on each side will look alright. I hope.
The rear section is almost completely "invisible" when the seats are in place. And the seat support (black painted part) breaks the line. So...