To make roof scoops/hood scoops: You can use plastic (the plastic on the back of the Modifiers package works great.), floppy disk metal, hard paper, or clay. Plastic- Cut and bend the plastic as necessary and paint, then use epoxy to attach it. Floppy Disk Metal- Cut and bend as necessary Hard Paper- "Brush" epoxy over the scoop to harden it. Then use epoxy to attach it to the roof or hood. Bondo-Just make a scoop on top of the hood or roof. If necessary use epoxy to attach it. First read my tutorial on how to use bondo. Click here