Molding in a hood scoop

I've always heard that there is NO WAY to smoothly bond fiberglas to steel without cracking. May last 3 months or 3 years, but cracks will happen. I think you are right about slamming the hood exasperating the problem, but think about the temperature changes a hood goes through. In cold weather when the engine warms up (or overheats) that's the hottest part on the body, then you shut it down and it cools off very quickly, fiberglass and steel expand and contract at different rates and BAM a crack. If someone comes up with a method that works, I'd love it, until then just plan on re-doing the scoop area every few years.