Bond a fiberglass scoop to a steel hood

There is a problem here. There are two types of resin and they are not compatible. Epoxy and Polyester. Epoxy will not adhere properly to polyester and vice versa. If you sand a part of the scoop and it has a floral smell it is polyester and you must use polyester resin. If it has no smell it is epoxy and you must use epoxy resin. It may "work" but it will almost surely crack or fail otherwise.
Maybe I am missing something, but I don't see where @George Jets mentioned epoxy.