I bonded my scoop pretty close to what Tim said.
But, instead of a glue, I used Bondo to stick the scoop down with screws to hold it in place. Once dry, I removed the screws, feather edged it, then layed down some strips of fiberglass sheets around the edge. Then sanded, and bondoed it smooth. The car has been on the road for almost 3 years with no problems.