Alumalite is great. Use it. Just do it. Easy to work with, really light, cheap, and really strong. I just followed the outline of the bumper plus 4 inches. It's attached to the chassis in 8 places plus pretty securely to the front fascia. This is my third splitter. My first was fiberglass, and looked really rough. I just couldn't get it to look as perfect as I wanted. The second model was wood with Plexiglas on top. it looked slightly better, but still, it didn't look as good as I wanted. Plus, the wood didn't hold up well to the elements, and the Plexiglas was fragile. The Alumalite is far superior in design and finish to the first two attempts.