Last year I had great success with a simple front airdam on my '98 Odyssey (first generation built on Accord chassis)
The underside of this car is UGLY!
That airdam broke off and I've been tinkering at this new one for a while. Finally got it together and installed.
Here are some pics.
Used 1/8" black ABS sheet, garden edging and push type plastic connectors as well as these nut inserts.