So here's what I managed to get done with a couple pieces of my coroplast.
First, I took off my airdam and chopped 2" off of the bottom. It was getting pretty abraded and I was afraid that the small cracks at the bottom would start working their way up the airdam.
So, now the airdam only portrudes an inch below the stock bumper.
I got a partial front bellypan on, it goes from the airdam to the back of the transmission/engine.
I also closed up the major parachute-like rear bumper area.
And here's a little shot of my 3" letter-stickers that I got from the hardware store.